You might want to check and see if the version of Nero you are working with is compatible with the drive... portable drives particularly can have compatability problems. Also, you might not have the proper driver installed for your CD-burner device, that's a DLL btw. Make sure you go to the CD-burners manufacturer's website, THEN download the latest driver for your SPECIFIC model and OS. Go into Control Panel select the drive and install the new drivers. Reboot and then see what happens...