To me it sounds like your MIDI Device is either not configured correctly, or has stopped working via the physical connections.

A. How is the SD-50 connected to the computer?
B. is the above device the same that is selected in BiaB MIDI Device window (Options-Prefs)?
C. Is the 'Reroute ALL MIDI to the default DXi synth' enabled? If so, MIDI won't get sent to the SD-50, it gets sent to the softsynth instead.

Next, is there a way to see if the SD-50 is indeed receiving the MIDI data and you are just not hearing it?
Have you tried plugging headphones directly in to the SD-50 headphone output?
If you hear sound there, the problem is getting that audio back to your current preferred monitoring system and shows the SD-50 is receiving the MIDI signal.


I do not work here, but the benefits are still awesome
Make your sound your own!