I have a StudioLive 24R rack mount mixer and I am using UC Surface for the management of the channels and routing. I have several channels routed to Aux 1 but when I open up my QMIX-UC on my iPhone and select Aux 1, I do not get any sound. I can hear the sound from the main monitors but I can't hear anything from my Phone. I am trying to use the phone as an in ear monitor.