U-Mix Control Pro - headphones not playing cue

Hello all,
After being wowed by the Cross DJ Free app from the Apple app store, I recently purchased a new U-Mix Control Pro for my MacBook Pro running Yosemite. So far everything is working fantastic except that I can not figure out how to get the headphones cue to work. When I select the A or B cue buttons on the U-Mix no signal will play thru the headphone jacks on the front panel. Any suggestions ? Thanks in advance !!

After being wowed by the Cross DJ Free app from the Apple app store, I recently purchased a new U-Mix Control Pro for my MacBook Pro running Yosemite. So far everything is working fantastic except that I can not figure out how to get the headphones cue to work. When I select the A or B cue buttons on the U-Mix no signal will play thru the headphone jacks on the front panel. Any suggestions ? Thanks in advance !!


