Reply to Multiple Traktor LE Problems

Hey guys,
I just downloaded the demo version of traktor LE toevening and I am having some problems. I'm using a Numark Mixtrack with a Macbook Pro, and no soundcard (reluctantly, I just don't have the bank.) I have two problems: The first is I have no crossfader, I have A/C and B/D selected with no joy. Secondly, I can't adjust the gain of individual tracks with my controller. Lastly, none of my effects work.
All of these problems could be just because I'm a noob, but hey, we all start somewhere.
Thanks,
Tregellex