http://msmvps.com/blogs/carlosq/archive/2008/09/16/mz-tools-articles-series-howto-using-the-process-monitor-procmon-tool-to-diagnose-visual-studio-add-ins-problems.aspxLast year I wrote a quite popular article HOWTO: Troubleshooting Visual Studio and Office add-ins , to diagnose many common problems with add-ins for Visual Studio or even Office. One invaluable tool to diagnose a whole range of problems with an add-inenCommunityServer 2008.5 SP2 (Build: 40407.4157)