Soundtrack Pro Vrs 2.0 hangs, won't open.

Soundtrack pro 2.0 won't open. It hangs as soon as I open it, until I force quit. It hangs on the opening screen for the app. I am using Soundtrack 2.0 with Final Cut Pro 6.0 on OS X 10.6.8. Running on MacPro Tower 2.66 GHz Quad-Core Intel Zeon w/ 12 GB RAM. I've trashed preferences for STP and emptied trash. Any suggestions? I have work I need to get done, this has completed stopped me from finishing, any suggestions would be most welcome! I thank you so much for any help in advance!