i have developed webservices using... .NET C# .
i can use C# client for webservices without any problem ..but while using VC++ client. im not able to get results of operation why????
here is Servieces and client

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = "http:/www.WbService07Name.com/webServices/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class ClsService07 : System.Web.Services.WebService
{
    public ClsService07()
    {

        //Uncomment the following line if using designed components
        //InitializeComponent();
    }

    [WebMethod]
    public string HelloWorld() {
        return "Hello World in console ";
    }


    [WebMethod]
    public double DoAdditon(double a, double b)
    {
        return (a + b);
    }


    [WebMethod]
    public string DispalyMethod(string str)
    {
        return (str + "Inside DispalyMethod");
    }

}

////////////////////////////////client vc++////////////////////////
void DisplayAdd()

{
try
    {
     ISoapSerializerPtr Serializer;
     ISoapReaderPtr Reader;
     ISoapConnectorPtr Connector;
    
     cout<<"test display:main\n";


     // Connect to the service
     Connector.CreateInstance(__uuidof(HttpConnec tor30));
     Connector->Property["EndPointURL"] ="http://localhost:1395/WbSer07/Service.asmx?wsdl";
     Connector->Connect();

     Connector-> Property["SoapAction"] = ""http:/www.WbService07Name.com/DoAdditon";
    
     // Begin message
        Connector->BeginMessage();


     // Create the SoapSerializer
     Serializer.CreateInstance(__uuidof(SoapSeria lizer30));

     // Connect the serializer to the input stream of the connector
     Serializer->Init(_variant_t((IUnknown*)Connector->InputStream));

    
     // Build the SOAP Message
     Serializer->StartEnvelope("","","");
     Serializer->StartBody("");
     Serializer->StartElement("DoAdditon08",L"http://localhost:1395/WbSer08/Service.asmx/","","");
    


     Serializer->StartElement("a","","","");
     Serializer->WriteString("10.1");
     Serializer->EndElement();
    
     Serializer->StartElement("b","","","");
     Serializer->WriteString("23.1");
     Serializer->EndElement();

    
     Serializer->EndElement();
     Serializer->EndBody();
     Serializer->EndEnvelope();
    
     // Send the message to the web service
     Connector->EndMessage();

    
     // Let us read the response
     HRESULT hr = Reader.CreateInstance(__uuidof(SoapReader30));


     // Connect the reader to the output stream of the connector
     Reader->Load(_variant_t((IUnknown*)Connector->OutputStream), "");


printf("Answer: %s\n",(const char*)Reader->RpcResult->text);



        
     BSTR br;
     Reader->RpcResult->get_text(&br);

     MSXML2::IXMLDOMElementPtr aTEST = Reader->RpcResult;
     BSTR aTest1;
     aTEST->get_xml(&aTest1);

     printf("Answer: %s\n",reinterpret_cast<const char*>(br));
     cout<<endl;
     cout<<BSTRtoChar(br)<<endl;



     Connector=NULL;
     Serializer=NULL;
     Reader=NULL;
}
catch(...)
    {
        cout<<"Error in execution :main\n";

    }

}


int _tmain(int argc, _TCHAR* argv[])
{
CoInitialize(NULL);



DisplayAdd();


CoUninitialize();



    return 0;
}


i m getting result ...0 always while calling "DoAdditon" method..
help me..?