Optiplex GX520 doesn't recognize any CDROM I swap in

I wanted to swap out the LITE-ON LTN-4891S CDROM with a Samsung SM-348 CD-RW/DVD Combo drive in the GX520 system. The operating system in the machine is Windows XP Pro SP3. The machine booted into the desktop. No problems noticed until I tried to open the drive with the eject command from the drive's right click menu through Explorer (file manager). The door to the drive just won't open. When I put in either a CD-R or a DVD the machine would lock up. The combo drives works perfectly in the machine I removed it from. But it won't work in the Dell. The BIOS and Windows reports that the drive is present. Could it be a cabling issue?