web services - SOAP PHP - SimpleType error response -

i've problem response of soap webservice.

i've structure:

<xsd:element minoccurs="0" name="sesso">     <xsd:simpletype>          <xsd:restriction base="xsd:string">             <xsd:enumeration value="m" />             <xsd:enumeration value="f" />         </xsd:restriction>     </xsd:simpletype> </xsd:element> 

and need response is:

<sesso xsi:type="xsd:string">m</sesso> 

but ns1:sesso type:

<sesso xsi:type="ns1:sesso">m</sesso> 

why this?

my php code one:

$server = new soapserver("assistiti.wsdl", array('soap_version' => soap_1_2)); $server->addfunction("aggiornaassistiti"); $server->handle();  function aggiornaassistiti() { $assistito = new stdclass();  $assistito->sesso = "m";  return $assistito; } 

(i'm using soapui tests)

try using soapvar. third parameter specifies type.