LG-4167B Help plz guys!

Okay so i purchased the 4167b and stuck it in my comp. It reads pretty much everything i put in EXCEPT blank dvd media. When i stick a dvd-r in (ive tried 2 different brands) it just tries to read then says no disc. Now the weird thing.

Before i went to RMA it i tried the drive in my Family computer. Works perfectly… Reads the Dvd-r blank media perfect (both brands)

Anyone heard anything like this and know why my comp wont read the blank media?? seems awfully weird. (both winxp sp2 DL12 firmware)

Thanks guys