Recording live and DAW into P16 cue mix system

Hi all,
New here and can't find specific info on this.
I have a decent amateur recording studio and just got the P16-I and several P16-M's to send out cue mixes.

So far I've been able to get all live channels from my interfaces routed to the analog inputs on the P16-I and sent out by cat5 to the P16-M's. I can't however get the output from my DAW routed into the P16's. I have two outputs on my interface playing the output of my DAW (channels 1 and 2), but no signal is going into the P16-I. Routed and connected the same way as the direct monitoring I've set up but no signal. What's going on?

Thanks for any ideas.