C# testiranje logovanja

Pozdrav narode,

konvertovao sam jedan .wsdl file u .cs i sada ta klasa ima ima metodu login koja sluzi za logovanje na web service (javin). Kreirao sam web service i dodao web referencu. E sad, kada instanciram objekat te klase i pozovem login metodu dobijem:

System.Net.WebException: The server committed a protocol violation. Section=ResponseStatusLine
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at SessionService2.login(String username, String password) in c:\Documents and Settings\---\My Documents\Visual Studio 2008\WebSites\wsTest\App_Code\SessionService2.cs:line 91
at Service.Logovanje() in c:\Documents and Settings\---\My Documents\Visual Studio 2008\WebSites\wsTest\App_Code\Service.cs:line 36



kod u Service.cs izgleda ovako:

30 [WebMethod]
31 public string Logovanje()
32 {
33 string username = "admin";
34 string password = "admin";
35 SessionService2 objSessionService = new SessionService2();
36 objSessionService.login(username, password);
37
38 return "Uspesno logovanje";
39 }


Moze li neko da mi pomogne oko ovoga?