If you have an OEM copy of Nero 5.5 that came supplied with your PC (that is not a retail boxed copy of Nero you installed) then you will find that Nero has tied itself to the original DVD drive and CDRW in the PC. It will not work with the new one until you pay for an update or buy another copy of Nero. I had the same trouble when I exchanged the Sony CDRW for a faster speed TDK CDRW in my PC. The
original NERO programme is OEM and came already installed on the PC. It will let me upgrade but it just wont burn. I have to use Roxio Easy CD which is a retail box copy I purchased separately.