I recently had a computer crash (Vista 32) and had to re-install everything, including Sonar 7 Producer and all of my Native Instruments and Toontrack VSTs. I went to open Sonar, and the only plugins showing up are from Cakewalk.
I've done a VST scan under Global Settings and added the folders to the list, but to no avail. I've checked both the Audio FX and Soft Synth as well.
All of the standalone versions work perfectly too. I did install all of the NI and Toontrack plugins before Sonar, so could that be the issue?