If you install Spotlight on SQL after installing Spotlight on Messaging, launching the Spotlight on Messaging diagnostic console from within the Spotlight on Messaging management console actually opens the Spotlight on SQL diagnostic console instead of the expected Spotlight on Messaging diagnostic console
Please uninstall and reinstall Spotlight on Messaging. This will place the proper DLL files in the directory structure to properly launch the Spotlight on Messaging Diagnostic console.
Spotlight on SQL will work as per normal.