Reply to S4 sound problem

I have a problem with my mac after I updated to osx mountain lion traktor pro doesnt get along with my mac. it sounds like this:
http://soundcloud.com/anasbeny/audio...ding-on-sunday

so i reinstalled traktor pro and still same thing even when I updated to traktor 2.5.1 I still get the same result as in the link. I attached a picture of my settings on my mac.
the weird thing the sound works perfect when the audio device is on built-in sound coming from my mac but with my windows desktop audio device works perfect with traktor s4 . I really need help fixing this by next week. thanks guys.photo.jpg