Login Problems with SOAP

Hi

I have downloaded the gwsdk and have tried running the vcsClient sample using the appropriate url and port but I keep getting an unhandled WebException saying 'The underlying connection was closed: The connection was closed unexpectedly.' It throws the error at the line 'resp = ws.loginRequest(req);'

I am using Visual Studio 2010.

I have also tried the SoapWise sample from GitHub but still get the same error.

Any ideas?

Thanks