Headphone Cue Issues! Ableton live 9
Hello
So I am learning how to operate and develop my own set and techniques with ableton live 9.My set is a macbook pro, apogee duet and APC 40 MKII. I having issues with setting up the headphone que correctly in ableton. I have set the cues to 3/4 and master out to 1/2 and activated the cue. The headphones replace the solo button. The track turns blue, and levels display, but it does not playback audio from the track. I would like to use this feature so i can reference what I will be playing out to the audience. Thanks.