When playing back audio while using the M-Audio Fastrack pro I get constant popping and clicking - even just a mono audio file, no effects, gain increase or anything.

This is only when using Sonar HS. (SoundForge, Acid, and Vegas all perform flawlessly with no latency or buffer setting adjustments.) I've tried all the suggested latency and buffering settings with no results. If I use the SigmaTel soundcard in my laptop it plays back fine.

I would tend to think this was a problem with the M-Audio device, were it not for the fact that all my other audio apps work just fine.

I'm using a Dell Insperion 6400 Duo core processor, 7200 rpm hd, 2 gig RAM. Windows XP pro. SP2
And like I said before, my OTHER Audio apps work fine!

Any suggestions would be great

kev