I have been using a Canoscan LiDE 40 scanner with my Windows machine for a few years with no problem. I downloaded the driver from Canon for Mac OS X recently and I'm now trying to get it to work on the Mac. It -should- work, but when I plug it in, the scan head moves about a cm, the head flashes, then it moves back. It does this every two seconds perpetually. Is this likely a driver problem or a hardware problem? Just to make sure it wasn't stuck, I took out the glass and helped the head along. I even tried moving the head all the way to the other side. It just retreats back to the starting position and starts its back and forth routine again. What gives?