button lights are not working on dj control instinct in traktor 2

what up, im having some issues: the lights of  the play button, cue button and others button are not working when i press them. ive been for a while without my mac and so without traktor but i remember the lights worked perfectly, but now, when i press the preview button to listen the track im about to play lights dont turn on. please help ! i would really appreciate it.

thanksss