Hi Wendy,
It seems like at some point you'd applied a Hi-Q sound to the track, or added a MIDI SuperTrack, which automatically added a Hi-Q sound.
You didn't do anything wrong, and there's no way you could have known that this would cause an issue. Band-in-a-Box really should have just removed Sforzando from the track automatically.
My fix should work right away though, I tested it pretty thoroughly.

Matt and VideoTrack, you're very welcome!
Cheers
Kent
PG Music