chroma17,
This might interest you...
I had some problems with several other plug-ins, related to a bug in Novation Automap 4.3 (which has now been fixed in an update, by the way, which can be downloaded here:
Automap 4.4.1).
To get all of the necessary plug-ins back, I eventually had to re-install PT 9.0.1, then re-update to PT 9.0.6. That did the trick!
Interestingly, Voce Chorus-Vibrato, the plug-in that had earlier suddenly stopped working, but which was not one of the ones that was replaced by the re-install, is now working again as well!
Pro Tools must have somehow got corrupted. Go figure!
If you've yet to solve your problem, hope this helps.
Cheers,
-Wayne