Help-g4midi problems Options

[bubba]

Does anyone know why i cannot get my powerbook g4/os9.1/oms2.3.8 to stay in contact with a usb midi interface for more than a few minutes?I've tried a midisport 2x2 and an emagic mt4,both with the same problem.It seems to happen with all my midi software,so it doesn't seem to be related to any particular program,and when it happens i have to restart the computer and it works again.I,ve turned off the'serial arbiter'in the extensions and activated the'floppy enabler',but this didn't help,any ideas?