Hi Ken,
What version of BIAB do you have?
In the meantime, try returning to factory settings. It's under the "Options" menu. This is what I always do when BIAB is not doing what it always has done.
Be aware that if you have an older version of BIAB, a factory reset means that you will also have to set-up MIDI and audio again.
If you have a more recent version of the program, save you settings before doing the reset. (This option is also under the "Option" menu.)
Regards,
Noel