Summary
When you try to access WebLink, the web browser displays text pages of the ASP.NET code.
Cause
The .NET Framework installation creates IIS mappings to associate file extensions and settings for ASP.NET. If you did not have IIS installed prior to installing .NET framework, or you uninstalled and reinstalled IIS afterwards, those .NET Framework IIS mappings will not be in place.
Workaround
Manually rerun the part of the .NET Framework installation that creates the necessary IIS mappings and settings.
To fix IIS mappings for ASP.NET
"%windir%\Microsoft.NET\Framework\v1.1.4322\aspnet_regiis.exe" -i
regsvr32 %windir%\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll
More Information
For more information, please see the following Microsoft Knowledge Base article:
How To Repair IIS Mapping After You Remove and Reinstall IIS