Wrong sound coming out of speakers with DJM-900

I run the Mixtrack Pro with the Pioneer DJM-900 mixer.  It is connected through the mixtrack output into mixer but the sound that is coming out through the bars speakers is the sound that i should be hearing in my headphones pre mixing.  Also, the sound only plays once i have hit the cue button so it is impossible to beat match a track through my headphones and i am left visually beat matching on screen, very tedious after a while.

If anyone can help me with what i should do or how i should set up id really appreciate it.  You can also email me directly @ jcfrost87@hotmail.co.uk

Thanks