I was trying to duplicate the Ubuntu 8.04 Hardy Heron CD, and have ran into some problems. I put in the disk, right clicked it and tried to copy it. After a few seconds, the CD copying program simply closes, and nothing is written to the blank disk. So I rebooted into windows, put in a fresh blank disk, hit duplicate (sonic RecordNow!), and it says that the copy completed successfully. However, when I put the copied disk into the drive, it says that there's no disk in the drive. I had the same problem with the Ubuntu Feisty and Ubuntu Gusty install CDs. This has not occurred, however, with any other CD that I've tried to copy. How can I duplicate the install CD?! (I didn't download any of the .iso files, friends of mine did that, as they were to take several days on my abysmal internet connection).