Error while trying to run project: unable to start debugging on the Web server
The Web server where you are trying to debug does not have the server components of Visual Studio .NET installed on it, or the server is that is running Windows NT 4.0. Visual Studio .NET does not support debugging Web applications on a Windows NT 4.0 server. Make sure that the server is running Windows 2000 or Windows XP.
If you are running Windows 2000 or Windows XP, you can correct the problem by running setup on the Web server and installing the server components of Visual Studio .NET. For more information, see Installation and Setup.