I just bought a 250-zip drive.Hooked it up,but my FD-4 doesn't turn on.I can hear the FD-4 clicking but the main window doesn't light up.All the wires are connected corectly and the light on the 250 is on.I then went back and hooked up my 100-zip and everything works fine.Has anyone else had this problem?Any ideas what could be wrong?Also, are the ORB drives that you've mentioned in previous reply's expensive?Where can I buy one?