visual c++ - While creating private pool WinBioOpenSession() is failing and returning WINBIO_E_CONFIGURATION_FAILURE -

i'm creating bio metric project in visual studio 2008 using mfc application in vc++ i'm getting following difficulties. please help
i'm trying create private pool using winbioopensession() method function returning winbio_e_configuration_failure should do?

bool cprivatepoolbiodlg::enrollfingerprint() {     winbio_unit_schema *unitschemaarray = null;     size_t unitschemacount = 0;      winbio_unit_id unitidarray[1]={};     size_t unitidcount = arraysize(unitidarray);      winbio_session_handle sessionhandle;      hresult hr; // = s_ok;     //enumarating devices...    hr = winbioenumbiometricunits(winbio_type_fingerprint,&unitschemaarray,&unitschemacount);     if(failed(hr))    {         cstring m;         m.format(_t("unable enumarate device 0x%08x"),hr);         afxmessagebox(m);         return 0;    }    //enumaration success...    unitidarray[0] = unitschemaarray[0].unitid;     //opening session...    hr = winbioopensession(winbio_type_fingerprint,winbio_pool_private,winbio_flag_basic,                             unitidarray,unitidcount,&private_pool_database_id,&sessionhandle);    if(failed(hr))    {     ///////////////////////here function returning winbio_e_configuration_failure////////////////////         cstring m;         m.format(_t("unable start session 0x%08x, %d"),hr, getlasterror());         afxmessagebox(m);         return 0;    }     //session opened...    winbioclosesession(sessionhandle);    return 1; } 

• before opening session should configure guid database registry , configure follow steps on.
• msdn private pool helper function , msdn private pool setup. before opening session call methods oninstall() create configuration , onadd() add sensor private pool privatepoolsetup.cpp.
• you should have following files in project.
• privatepoolcommondefs.h
• privatepoolsetup.cpp
• biohelper.h
• config.cpp
• display.cpp