I use DVD Shrink to create the ISO file and then use IMGBURN or DVD Decrypter to burn the ISO to the blank. This process has worked fine for several DVDs that I have copied. In fact, I successfully copied DVDs on Wednesday morning (yesterday) using TDK + R blank . Later, when I tried to make a second copy using the same ISO file, I was unsuccessful. When using IMGBURN, you get 3 windows - Progress rate, buffer and device buffer. The buffer was 100%, but the device buffer and progress showed 0% even after an hour. I rebooted and tried it several times with the same result. I need help in solving this problem. The forum administrator suggested updating the firmware. However, I am not sure how that will help. I was using the same (latest) version of IMGBURN both times (one successful one unsuccessful). Will greatly appreciate any help on this subject.