Hi Mac
I did indeed visit the M-Audio web site. This particular midi-controller is the M-Audio Keystation Mini 32. When connected to a PC Windows automatically looks for, and installs, the drivers.
On M-Audio's web site (Support/Download/Drivers) they only list drivers for Mac OS.

In the meantime I received this email from PG music.
I think I'll live without Midi controllers + BIAB/Realband until they can fix this bug!

PG MUSIC SUPPORT REPLY:

Hello,

I have had other users with this problem some with soundcards and mixers with the same error and some like you with midi keyboards, its just that I don't have a tool at my disposal that would force a driver to work better than it wants to naturally work. All that can be done is to remove the
Band-in-a-Box program and or the Midi driver and try re-setting it up.

I understand that 2013 did not have this problem and that could be for a number of reasons, that is why I suggest a wipe of Band-in-a-Box and re-install.

Thanks,
Rob
PG Music Inc.
www.pgmusic.com