Yes had this problem like most others I just dont have music on.
However I think a while back I fixed this using prog that used to be found in TTC download section, thats switches midi from hardware to software or vice-versa. Its a bundle of small untilities, 2 files of which allow for switching either way (don't ask which is now, or which isn't, u'll have to try both, my guess is hardware to software).
This also is a way to control volume of midi music if u cant already.
This may solve the problem, it may not. If not turn music off and play you own
Toontown Windowed (etc.)
'Keep it Kool
'