I kept getting this damn Response of

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Error 1 Access to the path 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\ws\04b0d857\7e4dd082\App_Code.compiled' is denied
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I found the answer here:

http://www.velocityreviews.com/forums/t118701-vs-2005-compilation-error-appcodecompiled.html

Quite simply, it says to allow WRITE access to the USERS group.

It fu*king works!!!

Been looking for this for over a week.