Thanks for the reply.
I've used both CC64 and CC123 for mapping. BFD will show the midi signal being sent correctly, but I can't figure out which button within BFD to map the sustain switch.
After reading John Emrich's reply in another thread, I tried to find a "panic" button as he suggested. It wouldn't surprise me if it's there, and that I don't know where to look. That's why I tried mapping the sustain switch to the "mute" on the master volume. BFD takes the mapping, and correctly assigns the CC#, but there's no effect.
I'm not using a DAW right now, as I play using BFD3 as a standalone program with streaming tracks or iTunes files.
Regarding a MIDI chain, I'm new at this so I'm not sure what that is. I have a Behringer MIDI interface to a Macbook Pro.