This problem that LionSound mentioned is still exactly the same in Vista 32bit too and I'm sorry to say that the 1.1.3. update does not solve it at all. "I am attempting to us AP as a synth inside Sonar 6.2.1 in Vista64, but it has problems. It loads and plays fine for a few minutes and then the sound dissappears and the audio meter in Sonar shoots up to plus 50db or something crazy. From what I have read AP is known not to work as a plugin in Vista, but what I need to know is when will it be fixed? Vista has been out for over a full year now, and AP should work in it eventually."