Reply to Headphones not cueing properly

Hey all,

I have had headphone cueing running properly in the past, but it is giving me trouble now.

My Audio 2 DJ is plugged in and on. Headphones are in B and Main A. Output routing has: Monitor 3&4 Master 1&2

Main is 50% Mix 0% Vol 50%

All these settings look right, but when I active cue it plays from master and headphones.

Any ideas how to get queuing working?