Audiobox1818 on Mac w/ Universal Controler: Can't Hear Metronome

I have watched the videos, song set-up creating cue mix on chaels 7&8, going into Mac utilities and updating Midi Audio set up.

In the headphones:

I can record and hear the mic.

I can playback and hear the recorded track.

I can't hear the metronome no matter what I do.

In the studio monitors:

I can hear the mic

I can hear the recorded track

AND I can hear the metronome during recording and playback.

Can anyone help me out?