Reply to m-audio fast track pro wont let me use headphones on traktor 2.21

hey guys
im using traktor 2.2.1 (because u cant midi map the remix decks) on a PC windows 8
i got the m-audio fast track pro sound card
i have all of the drivers and its working fine even with traktor but i can setup the monitor output to the front headphones jack or any other one!!! for my speakers im using the back red and white jacks (forgot that name)
anyway please any1 can help me out here? i tried using it with the normal audio headphone jack but traktor didnt recognize it... big ups for helpers