I have a computer running Windows Xp sp2 pro, Nero 22.214.171.124, Alcohol 120 and DVDRW "LG GSA-H12N". I always copied any kind of media and burned tens of images but yesterday I decided to try clonecd 126.96.36.199 and after installation and reboot I was no longer able to erase cd or dvd. Using nero the error message was: Invalid command Using clonecd: Disc erase failed I tried different routes in order to solve the problem: a) phisically removed LG unit and tested it on another pc. It worked perfectly b) Re-attached LG and updated the firmware c) tried again using 5 new TDK but the problems was still present so I substituded LG with a NEC NEC ND-3520A but nothing to do. Finally I completely removed Nero, Alcohol and Clonecd using Total Uninstall. After a reboot I again installed Nero and Clonecd and now I'm able to erase and burn disc using Nero but not using Clonecd that, during an erase attempt say: "Disc erase failed". The strange thing is that writing an image is ok but when it attempts to burn the image on the cd, the error is: Writing to NEC ND-3520A failed I didn't find a solution although I searched for hours using google. Can someone give me any suggestion please?