Ok, I have tried almost everything. I have a BenQ 1620 OEM Dvd-rw in an Usb enclosure and I can burn files ok, however whenever I try to burn dvd Iso image files I always recieve the error. The burner is new and I have searched quite a bit around the forums. I had made sure it was set to DMA mode, turned off the IMAPI, set the buffer level at 20-30mb. I use TDK DVD-R 8x discs and set the speed at 2.4x which is the slowests. Also, I've tried using Nero 6.6, Dvd decrypter and Alcohol 120% and all give me that error. The test modes are fine, but when i do the actual burning it doesn't start because of the error. So there's really no other way I can find that might fix it. Sorry, if I'm a newb to this forum, but I hope some1 can help. Thanks.