http://blogs.msdn.com/b/profiler/archive/2008/08/22/vs2008-sp1-website-profiling-bug-and-workaround.aspxVisual Studio 2008 Service Pack 1, while fixing many profiling bugs, has also unfortunately introduced an issue with website profiling. If you have a website project created with a pre-SP1 version of Visual Studio and then try to profile it using instrumentationen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)