Sorry Matt, I can't as I've no sound from biab to the keyboard. I also use reason and east west play. They're both fine as stand alones but not in biab
I think the "I've no sound from biab to the keyboard" is a typo. I think you meant to your Behringer as the keyboard has not sounds, i.e. it is a MIDI controller.
Have you checked your channels? Maybe something is messed up there, especially with the thru channel. It sounds like a patching problem, that is if BiaB is OK. Maybe you got a bad BiaB DL, CD, or HD?