I need help. My Mac is an older G3, 233 mhz, beige desktop model, which came out about the time USB was beginning to be used. (Made in 1998). Machine ID is 510. After upgrading to system 9.2.2, I installed a Keyspan USB card, which shows in the system profiler as being there, but I can't get any response to USB devices which I have hooked up to the port. Any suggestions?