I know that many people have a problem with the Soundtrack Pro 3 startup. I have recently purchased Soundtrack Pro 3 and installed everything that came in the package. The installation went fine but when I open the application it hangs. The main window appears on the screen but then freezes then I need to force quit the application to close it. Can you tell me the reason why Soundtrack Pro 3 hangs at startup ?? I have mac os x 10.5.6 on my powerbook G4.