HD I/O with MTRX

[Artis]

Hi!
I have MTRX interface and I want to use my HD 16x16 as analog output for headphone monitoring via DADman. I have daisy chained HD to MTRX and Loop Synced it. If PHD mode in DADman is set to Pri/Exp then HD is following MTRX sample rate and I can route outputs from Pro Tools. but fortunately - they are not available in DADman for Talkback. If I set PHD mode to 2xPri, then I can see HD outputs in DADman, I can assign Talkback in DADman to those outputs but now I can't force HD to follow MTRX sample rate. I have tried different configurations, but can't get it work.
Now I have to choose - forget Talkback function via Eucontrol and to use Pro Tools routing only or to have one static sample rate to HD I/O (other MTRX sample rates just mutes HD).
Any ideas how to get this to work?