Steinberg MR816CSX - no sound to monitors

Unlike many of you I’m using a mac with my MR816 and logic as my DAW. I have two Yamaha HR monitors connected to the unit via output channels 1 and 2. There is no sound. I am dumbfounded.

Sound comes out via the headphone channels, but not the monitors. I connected them the way the manual instructs. Anybody have any ideas?

Probably a routing issue in Logic. Also, in the MR editor, you have to set the volume output for the MR output channels.