Please try to delete the contents of the following folders, restart your computer and let us know whether the problem still persists:
- C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files
- C:\Documents and Settings\MACHINENAME\VSWebCache\MACHINENAME
- C:\Documents and Settings\MACHINENAME\Local Settings\Application Data\Microsoft\VisualStudio\9.0\ProjectAssemblies
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