1. While you may think they are set and connected "right" you didn't reveal the cable type or the jumper settings you tried. Hint: on 80 conductor IDE cables, "right" is not master/slave but may work ... sometimes.
2. You didn't tell if the bios was:
b. All defaults.
3. It's new. Why isn't this being persued with the vendor?
Best of luck,
Im trying to build a new computer and Im having trouble getting the mobo to recognize the optical frives that I have. They are connected right, the jumpers are set right. Im using a Lite On DVD-ROM XJ-HD166S and an MSI DVD-RW DR-12a. The motherboard is an ASUS P4S800 with an SIS 648FX chipset.