Hi, I am trying to profile my ISAPI filter (on IIS 5). I followed the instructions in: KB195768 (href="http://support.microsoft.com/support/kb/articles/Q195/7/68.asp" - How To Profile an ISAPI DLL) and in: 117681 (href="http://support.microsoft.com/kb/117681/EN-US/" - Profiling Windows NT Services) first, I found a few discrepancies and erros in KB195768: 1. it says __ProfileBPI instead of __ProfilePBI 2. it referes to a Profile.ini on <...>\Program Files\Microsoft Visual Studio\VC98\Bin and I guess it means Profiler.ini After running PREP /OM /FT myfilter.dll I copied myfilter._ll instead of the original myfilter.dll that is defined as the filter. I also copied the myfilter.pbt & myfilter.pbi files to the same location as well as profile.dll, profile.exe & profiler.ini - all to the same directory where the filter is located. I set the 2 env variables: __ProfilePBI=<path>\myfilter.pbi __ProfilePBO=<path>\myfilter.pbo Now, when I try to restart the IIS I get "Error 1053: The service did not respond to the start or control request in a timely fashion." and the service doesn't start. To make sure it is not a permissions problem, I added the user "IWAM-<xxx>" to the Administrators group. still the same result. sorry for the long mail - it got a little out of control here, but this is the end...:-) Anybody know what I am missing? thanks Asaf