I just tried plugging in the modem with the phone cables to the mac and it did the same thing as before. It doesn't matter if the modem is on or off, if I plug it into the SCSI port, it locks up. I can move the cursor around, but I can't click on anything. If I turn on the computer with the modem pluigged in, it stays on the grey screen, but as soon as I unplug it, it will happy mac and boot normally. xx(