Ok guys, this is my last plea to experts before i have to turn to ...gulp....customer support! I have a Sony DRU 500A with the latest firmware (2.0e). I have Nero 126.96.36.199. I have an AMD XP@ 1.6ghz. I have 1gb of RAM. I was ripping DVD's using DVD Decryptor and compressing using DVD2ONE and finally burning using NERO...following all the steps. (I know how to burn a DVD) Then, i switched firmware to the 1.0e (i believe). Now Nero will allow me to make a CD no problem but if i attempt to erase or create a dvd i recieve the message "Power Calibration Error". PLEASE PLEASE are there any suggestions? I have been working on this problem for over a week! Jovanni77 suggested it could be a glitch in my registry....so as a desperate act...i reformatted my HARDDIRVE! I have reinstalled Windows XP....but still "power calibration error"!!!! Can somebody help me?