DDJ ERGO K - Headphone issues

Hi, I just got my new ERGO-K last week and I'm really happy about it. The thing is that i have a problem with the headphone jack. I'm using DJAY by algoriddim and everything except the headphones work, which suck because I kind of need pre-queuing! I searched google and found an old thread, from this site, that i read fully through, but none of it helped solving the problem. I wrote this new thread because the other one seemed dead, and everybody talked other DJ apps like Traktor and VDJ. 

Just to be clear, I'm using DJAY on my DDJ ERGO K, and I have updated the firmware to 1.20.

Please help!