In our case, the Citrix Webinterface stopped working. Running "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe -i" to repair and register .Net 2.0.x with IIS.
- Error code: 3006, error message: "A parser error has occurred" - See the link to "Microsoft TechNet Forums - A parser error has occurred " for information on this problem.
Incorrect permissions to the Windows\Temp folder can cause this issue. See ME950610
See the link to "DotNet Forum Topic" for a possible solution to this problem.
From a newsgroup post: "I resolved this problem by cleaning up the "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files" folder”. See the link to “Could not load file or assembly” for the original post.