You got a dud - it happens. I've read some pretty bad reviews of Pioneer's quality control of late. You could try updating the firmware, but there is no guarantee it will have any effect.
sorry, but what is a DUD, i am not such in computer hardware and software :S
i live in thought that my software is wrong for that and maybe the motherboard
cuz i am now getting some new computer, and i hope it will work on new one,
i have heard that the pioneer burners are a quite good ones, not the best but in that range :S