Hi I just bought Cross and am trying to set it up for a gig tmrw.

I have a few bugs figured out, but I can't seem to get my headphone jack to work on my Numark N4.
My headphones work fine, maybe it's some sort of sound setting I'm unaware of? Master volume is playing out just fine to my home speakers.
Any help appreciate, my gig is tomorrow!!!
Muchas Gracias,
Ben