Mappoint web service

Today we were trying to use map point web service in asp.net using Visual Studio.NET 2003.

Its failed with the error message 401 unauthorized access.

The same web service we have tried from Windows application using Visual Studio .NET 2003. Now this was working fine.

So we have tried google web service & some other third party web services to find out whether they work in ASP.NET web applications. All web services were throwing the same exception.

Atlast we have tried in Visual Studio.NET 2005 (on the same machine). To our astonishment, it worked well without any exception.

;-)

I need to understand why it is happening this like.