10.4.9 Update issue with USB device

After updating the OS to 10.4.9 my iriver e10 won't apppear on the desktop or in the toolbar.  
Its recognised in the system profiler, its just i can't access it. I've tried switching the cable between usb ports, so it can't be those and i know its not the iriver because it works on my pc.... if anybody could help i would be very grateful