Try unticking DMA and use PIO instead via the Device Manager for your IDE channels. I have a A04 set as a Master on the Secondary IDE and a DVD-ROM as a Slave to that. Never had a problem as of this date. See if that helps. Like it was said before dont multitask your PC while burning, have antivirus software closed and don't have loads of programs running at the same time even though the drive has buffer underrun protection.
See if that helps.!
