Why does it say it's off in the log?
It also shows 3 DVD drives. Do you really have 3 DVD devices?
=== Scsi-Device-Map ===
DiskPeripheral : WDC WD1200JB-00EVA0 atapi Port 0 ID 0 DMA: On
CdRomPeripheral : HL-DT-ST RW/DVD GCC-4521B atapi Port 1 ID 0 DMA: Off
CdRomPeripheral : Generic DVD-ROM 1.0 d347prt Port 2 ID 0 DMA: Off
CdRomPeripheral : Generic DVD-ROM 1.0 d347prt Port 2 ID 1 DMA: Off
=== CDRom-Device-Map ===
HL-DT-ST RW/DVD GCC-4521B D: CDRom0
Generic DVD-ROM E: CDRom1
Generic DVD-ROM F: CDRom2
Try disconnecting the drives leaving only the burner and try it like that.