Connecting to server in discountasp.net with VS 2010 Express Edition?

Hey ppl, I'm currently using the Windows Phone development tools in Visual Studio 2010 Express Edition(VS 2010 Xpress) and I am trying to make a call to my server here in discountasp.net via the "add service reference" in VS 2010 Xpress but the error message that came back was that they couldn't understand the form of the service reference. I am really new at C# and VS, so a detailed explanation would be really appreciated if anyone have the solution to the problem

Thanks in advance.