For some reason, if you install IIS after
you've installed .NET, IIS will not recognize ASP.NET pages. To fix this, go to:
Start>Programs>Microsoft Visual Studio.NET 2003>Visual Studio.NET Tools>Visual Studio .NET 2003 Command Prompt
In the Command prompt, type aspnet_regiis -i.
Note: Visual Studio 2003 is used in this example. However, the command prompt is available in all versions.