I have a Dell Inspiron 4000 laptop with an exchangeable cdrom/floppy. When I put the floppy drive in, it works fine. When I put the CD Drive in, the laptop recognizes that the CDROM is in, but will not read the disks or even attempt to spin the drive. I have tried replacing the drive thinking it was a faulty drive, but it still does not work. The message I get is "Please insert a disk into drive D:". The laptop is running Windows ME (Ugh!, that is another issue). Any suggestions? Thanks.