DJM 750MK2 master output problem

Just got the new 750MK2, I use serato so I had it wired in through my SL1, all running fine. Then I remembered I get rekordbox DJ free with the mixer so I stopped playing, installed the new rekordbox, then went to mix again on serato and nothing is playing out my speakers, serato is running fine, I can get sound out of my headphones and the LEDs are reading the signal, but the sound is only being registered on the right side. My speakers work fine through anything else, I've since updated the firmware on the mixer and downloaded the driver for it and also deleted the driver and rekordbox and redownloaded it all again, tried different cables in different outputs, changed all the Phonos around, turned it off and on again. If there could be a simple answer to this that'd be great because my mind is boggled right now.