New HP DVD causes PC to shut down

Hi guys - I recently bought a new HP DVD 1135t writer since my old CD-Rom (DVDRW IDE16x) wasn't reading cd's anymore. After installing it, I first received an error message saying ATAPI incompatible, press F1 to resume, and carried on.
When i tried to load a CD my PC shut down and does this every time i try to load a cd.
I tested the power supply and all looks fine, the fan seems to be working fine, tried changing the jumpers, even returned it to the shop and got a new HP DVD writer, and it still won't work!!
I'm running out of ideas. Anyone have a clue what I should do - other than return it and get my money back?
Cheers
 
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