web services - SOAP response Error using WSDL in php -

i using soap call wsdl file, getting below error.. below error

soapfault exception: [a:internalservicefault] object reference not set instance of object. in /opt/projects/php/dev1/sopadatatest.php:40 stack trace: #0 /opt/projects/php/dev1/sopadatatest.php(40): soapclient->__call('accountsignup', array) #1 /opt/projects/php/dev1/sopadatatest.php(40): soapclient->accountsignup(array) #2 {main}

$url = "signup.wsdl";  $data = array( "signupinformation" => array("accountname" => "secret",                          "affiliateid" => "secret",                         "comment" => "secret",                         "currencycode" => "secret",                         "dba" => "secret"                         ), "primarybankaccountinformation" => array("accountname" => "external",                          "accountnumber" => "2012-10-20t00:04:34.479z",                          "accountownershiptype" => "2012-10-20t00:04:34.479z",                          "accounttype" => "ext-id-00502",                          "bankname" => "test ",                          "countrycode" => "customer contact",                          "routingnumber" => "123456789"                     ) );  try {     $soapclient = new soapclient($url, array('soap_version' => soap_1_1, 'trace' => 1, 'exceptions' => 0      // debugging, disable in production         //"connection_timeout" => 1     ));      // list types idea how call methods, since looks     // there no pages in .asmx services      //var_dump($soapclient->__gettypes());      $response = $soapclient->accountsignup($data);     echo $response; } catch (exception $e) {     trigger_error("soap error: ".$e->getmessage(), e_user_warning); } print_r($e); 

and below wsdl file trying unable solution doing above code , and getting above error message while printing response ..can 1 tell me did wrong might more helpful me ..

<?xml version="1.0" encoding="utf-8"?> <wsdl:definitions name="signup" targetnamespace="https://clickandpledge.com/applicationservice/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex" xmlns:wsap="http://schemas.xmlsoap.org/ws/2004/08/addressing/policy" xmlns:msc="http://schemas.microsoft.com/ws/2005/12/wsdl/contract" xmlns:i0="https://clickandpledge.com/signup/" xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy" xmlns:xsd="http://www.w3.org/2001/xmlschema" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:tns="https://clickandpledge.com/applicationservice/" xmlns:wsa10="http://www.w3.org/2005/08/addressing" xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl" xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing">     <wsdl:types>         <xs:schema elementformdefault="qualified" targetnamespace="https://clickandpledge.com/applicationservice/" xmlns:xs="http://www.w3.org/2001/xmlschema">             <xs:import namespace="http://schemas.datacontract.org/2004/07/applicationservice" />             <xs:element name="accountsignup">                 <xs:complextype>                     <xs:sequence>                         <xs:element minoccurs="0" name="key1" nillable="true" type="xs:string" />                         <xs:element minoccurs="0" name="key2" nillable="true" type="xs:string" />                         <xs:element minoccurs="0" name="signupinformation" nillable="true" type="q1:signupinformation" xmlns:q1="http://schemas.datacontract.org/2004/07/applicationservice" />                         <xs:element minoccurs="0" name="primaryaccount" nillable="true" type="q2:primarybankaccountinformation" xmlns:q2="http://schemas.datacontract.org/2004/07/applicationservice" />                     </xs:sequence>                 </xs:complextype>             </xs:element>             <xs:element name="accountsignupresponse">                 <xs:complextype>                     <xs:sequence>                         <xs:element minoccurs="0" name="accountsignupresult" nillable="true" type="q3:signupresult" xmlns:q3="http://schemas.datacontract.org/2004/07/applicationservice" />                     </xs:sequence>                 </xs:complextype>             </xs:element>         </xs:schema>         <xs:schema attributeformdefault="qualified" elementformdefault="qualified" targetnamespace="http://schemas.microsoft.com/2003/10/serialization/" xmlns:xs="http://www.w3.org/2001/xmlschema" xmlns:tns="http://schemas.microsoft.com/2003/10/serialization/">             <xs:element name="anytype" nillable="true" type="xs:anytype" />             <xs:element name="anyuri" nillable="true" type="xs:anyuri" />             <xs:element name="base64binary" nillable="true" type="xs:base64binary" />             <xs:element name="boolean" nillable="true" type="xs:boolean" />             <xs:element name="byte" nillable="true" type="xs:byte" />             <xs:element name="datetime" nillable="true" type="xs:datetime" />             <xs:element name="decimal" nillable="true" type="xs:decimal" />             <xs:element name="double" nillable="true" type="xs:double" />             <xs:element name="float" nillable="true" type="xs:float" />             <xs:element name="int" nillable="true" type="xs:int" />             <xs:element name="long" nillable="true" type="xs:long" />             <xs:element name="qname" nillable="true" type="xs:qname" />             <xs:element name="short" nillable="true" type="xs:short" />             <xs:element name="string" nillable="true" type="xs:string" />             <xs:element name="unsignedbyte" nillable="true" type="xs:unsignedbyte" />             <xs:element name="unsignedint" nillable="true" type="xs:unsignedint" />             <xs:element name="unsignedlong" nillable="true" type="xs:unsignedlong" />             <xs:element name="unsignedshort" nillable="true" type="xs:unsignedshort" />             <xs:element name="char" nillable="true" type="tns:char" />             <xs:simpletype name="char">                 <xs:restriction base="xs:int" />             </xs:simpletype>             <xs:element name="duration" nillable="true" type="tns:duration" />             <xs:simpletype name="duration">                 <xs:restriction base="xs:duration">                     <xs:pattern value="\-?p(\d*d)?(t(\d*h)?(\d*m)?(\d*(\.\d*)?s)?)?" />                     <xs:mininclusive value="-p10675199dt2h48m5.4775808s" />                     <xs:maxinclusive value="p10675199dt2h48m5.4775807s" />                 </xs:restriction>             </xs:simpletype>             <xs:element name="guid" nillable="true" type="tns:guid" />             <xs:simpletype name="guid">                 <xs:restriction base="xs:string">                     <xs:pattern value="[\da-fa-f]{8}-[\da-fa-f]{4}-[\da-fa-f]{4}-[\da-fa-f]{4}-[\da-fa-f]{12}" />                 </xs:restriction>             </xs:simpletype>             <xs:attribute name="factorytype" type="xs:qname" />             <xs:attribute name="id" type="xs:id" />             <xs:attribute name="ref" type="xs:idref" />         </xs:schema>         <xs:schema elementformdefault="qualified" targetnamespace="http://schemas.datacontract.org/2004/07/applicationservice" xmlns:xs="http://www.w3.org/2001/xmlschema" xmlns:tns="http://schemas.datacontract.org/2004/07/applicationservice">             <xs:complextype name="signupinformation">                 <xs:sequence>                     <xs:element minoccurs="0" name="accountname" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="affiliateid" type="xs:long" />                     <xs:element minoccurs="0" name="comment" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="currencycode" type="xs:int" />                     <xs:element minoccurs="0" name="dba" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="givebigcampaignid" type="xs:long" />                     <xs:element minoccurs="0" name="mailingaddress" nillable="true" type="tns:address" />                     <xs:element minoccurs="0" name="physicaladdress" nillable="true" type="tns:address" />                     <xs:element minoccurs="0" name="planid" type="xs:long" />                     <xs:element minoccurs="0" name="referalid" type="xs:long" />                     <xs:element minoccurs="0" name="taxid" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="timezone" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="user1" nillable="true" type="tns:user" />                     <xs:element minoccurs="0" name="user2" nillable="true" type="tns:user" />                     <xs:element minoccurs="0" name="websiteurl" nillable="true" type="xs:string" />                 </xs:sequence>             </xs:complextype>             <xs:element name="signupinformation" nillable="true" type="tns:signupinformation" />             <xs:complextype name="address">                 <xs:sequence>                     <xs:element minoccurs="0" name="address1" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="address2" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="city" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="country" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="state" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="zipcode" nillable="true" type="xs:string" />                 </xs:sequence>             </xs:complextype>             <xs:element name="address" nillable="true" type="tns:address" />             <xs:complextype name="user">                 <xs:sequence>                     <xs:element minoccurs="0" name="email" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="firstname" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="lastname" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="phone" nillable="true" type="xs:string" />                 </xs:sequence>             </xs:complextype>             <xs:element name="user" nillable="true" type="tns:user" />             <xs:complextype name="primarybankaccountinformation">                 <xs:sequence>                     <xs:element minoccurs="0" name="accountname" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="accountnumber" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="accountownershiptype" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="accounttype" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="bankname" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="countrycode" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="routingnumber" nillable="true" type="xs:string" />                 </xs:sequence>             </xs:complextype>             <xs:element name="primarybankaccountinformation" nillable="true" type="tns:primarybankaccountinformation" />             <xs:complextype name="signupresult">                 <xs:sequence>                     <xs:element minoccurs="0" name="accountid" type="xs:long" />                     <xs:element minoccurs="0" name="code" nillable="true" type="xs:string" />                     <xs:element minoccurs="0" name="description" nillable="true" type="xs:string" />                 </xs:sequence>             </xs:complextype>             <xs:element name="signupresult" nillable="true" type="tns:signupresult" />         </xs:schema>     </wsdl:types>     <wsdl:message name="isignup_accountsignup_inputmessage">         <wsdl:part name="parameters" element="tns:accountsignup" />     </wsdl:message>     <wsdl:message name="isignup_accountsignup_outputmessage">         <wsdl:part name="parameters" element="tns:accountsignupresponse" />     </wsdl:message>     <wsdl:porttype name="isignup">         <wsdl:operation name="accountsignup">             <wsdl:input wsaw:action="https://clickandpledge.com/applicationservice/isignup/accountsignup" message="tns:isignup_accountsignup_inputmessage" />             <wsdl:output wsaw:action="https://clickandpledge.com/applicationservice/isignup/accountsignupresponse" message="tns:isignup_accountsignup_outputmessage" />         </wsdl:operation>     </wsdl:porttype>     <wsdl:binding name="basichttpendpoint" type="tns:isignup">         <soap:binding transport="http://schemas.xmlsoap.org/soap/http" />         <wsdl:operation name="accountsignup">             <soap:operation soapaction="https://clickandpledge.com/applicationservice/isignup/accountsignup" style="document" />             <wsdl:input>                 <soap:body use="literal" />             </wsdl:input>             <wsdl:output>                 <soap:body use="literal" />             </wsdl:output>         </wsdl:operation>     </wsdl:binding>     <wsdl:service name="signup">         <wsdl:port name="basichttpendpoint" binding="tns:basichttpendpoint">             <soap:address location="https://application.cloud.clickandpledge.com/signup.svc" />         </wsdl:port>     </wsdl:service> </wsdl:definitions>