Repair IIS Mappings to .NET
Provided by: Molly
Pell, Technical Project Manager
If you install IIS AFTER installing the .NET Framework, IIS will not be
properly mapped to ASP.NET. This may cause ASP.NET web applications or
services to give you an error such as:
Visual Studio .NET has detected that the specified Web server is not running
ASP.NET version 1.1. You will be unable to run ASP.NET Web applications or
To resolve this issue, you must repair IIS mappings to ASP.NET. To
accomplish this, you can either uninstall and reinstall the .NET Framework,
or follow these steps:
Open the Windows command prompt console window:
At the command prompt,
is the directory of your Windows folder (e.g. C:\WINDOWS) and
is the actual version number of the .NET Framework (e.g. v1.1.4322).
Press Enter to run the executable. When it completes, close the command
prompt console window.
After aspnet_isapi.dll has been successfully registered, the IIS mappings to
ASP.NET are repaired, and you will no longer encounter the error.
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