To use the Web Forms samples, Internet Information Services (IIS)
must be installed. You should install IIS before you install
Visual Studio .NET. If you install Visual Studio .NET first you
might see the following error message:

  Error while trying to run project: Unable to start debugging
  on the Web server. The server does not support debugging of
  ASP.NET or ATL Server applications. Run setup to install the
  Visual Studio .NET server components. If setup has been run
  verify that a valid URL has been specified.

  You may also want to refer to the ASP.NET and ATL Server
  debugging topic in the online documentation. Would you like to
  disable future attempts to debug ASP.NET pages for this project?

To fix this problem try the following steps:

1. Make sure IIS and the FrontPage 2000 Server Extensions are
   installed using Add/Remove Windows Components in Add/Remove
   Programs.
2. Uninstall .NET Framework in Add/Remove Programs.
3. Rerun VS .NET setup and reinstall the .NET Framework.

See the Visual Studio .NET online Help for more information.
If the procedure above does not help you can solve the problem
by building the Web Forms samples from scratch as outlined in
Chapter 13.
