DVD internal Rewriter

It could be a fault with the hardware, and may need to be sent back.

First test though is to give it a seperate power source.

Try using a seperate power connector from your power supply, and not one sharing with fans, etc to see if its a power issue.

Is it recognised in the BIOS? Can you open and close the drive? (i.e, its recieving power)

Also try using another SATA port/cable on your motherboard (or if its IDE, another IDE lead) to check this also.

Try plugging it into another computer.