Reply to My Stealth Control wont appear. help me please!!

Hello, I got a stealth control this week. I've installed the Traktor LE on my Macbook Pro, which comes with it, and the omnicontrol driver which is on the same disk. Firstly, is this the right driver? I thought the omnicontrol was a different piece of hardware??
Once I opened traktor the first time, it asked if i was using a controller, and i put in the information for the numark stealth control.
I've registered with native instruments and downloaded all of the updates, but no matter what i do the stealth wont appear in finder or in trktor, and there are no lights on. it's utterly lifeless.
I've gone into the preferences on traktor and on to midi control. It brings up the stealth control, with a cross in the active box, which disappears when i unplug the stealth from the usb, and is replaced with something along the lines of not found.
Does anyone know what I need to do? Any help would be very much appreciated.. Thanks xxxx