I think this is helping me hone in on the problem. Really everything has been working all along, except for the assignment of drums. All of the patch and channel settings are correct, and they seem to be stable (in fact, overall I've found in using the package that BiB is stable ... I haven't had problems with hangups and abnormal terminations in BiB which is good considering it is supporting a variety of files and drivers and ports).
The only problem is that I don't have access to drums. In looking through the various menus (and documentation) for BiB, I get the impression that it is difficult to turn off Realdrums (I've found many places that you have to set to suppress these things ... they are like zombies ... they don't die). And indeed they may be the better choice if you are using a computer as your synth, or mixing everything then sending to a speaker.
I'm using my Roland with headphones, so ... partly for simplicity ... I want everything to run through the Roland synth ... I want just MIDI coming out of the computer.
I've been playing with RealBand to see if it might be easier to get the MIDI to work, but run into the same problems -- there just doesn't seem to be access to the Roland drum kits.
Chris