Hi, I have been using DVD decrypter for a while now but recently some of the DVD's that I have tried to copy have numerous read errors and some even have I/O errors with the following text below. This has prevented me making any backups of the new DVD's. Does anyone have any idea what could be causing the problem. I have cleaned the discs properly even though they are relativley new discs and it is a new HP 940d DVD-RW drive. I/O Error! Device [1:0:0] HP DVD Writer 940d 3H23 (G(ATA) Scsistatus: 0x02 Interpretation: Check Condition CDB: A3 00 00 00 00 00 00 00 00 10 01 00 Interpretation : Send Key - Challenge Key (0) Sense Area: 70 00 05 00 00 00 00 0A 00 00 00 00 6F 00 00 00 00 00 Interpretation : Copy Protection Key Exchange Failure - Authentication Failure Any help would be greatly appreciated.