Numark Mixtrack

Hello,
I have a problem with the interception of songs in a playlist on the Controller, the designated button does not work in mapping and I did not find any command that I could reset. The Traktor DJ functioning normally. Please advice, or what to buy another controller? I am using Mac OSX with the retina.

Hi,

* Which button do you mean exactly?
* Also, which djay version are you using?

I downloaded the demo version of djay PRO version 1.0
I mean the 8 button Browser Knob