Ok..like this I have a NEC DVDRW 1300, and I have burning problems. All CD-R and CD-RW burns perfectly, but when I burn on a DVD-R it makes mistakes. Like this..while burning it reports no errors, but when the burning is finished I can open from that DVD-r 6 out of 10 files..the other files wont open. Im using Giga Master DVD-R 1x-4x. I tried it burning in lower speed, but there are mistakes again. I updated the firmware from the NEC site, and it didnt help. I tried to put the DVDRW on master on IDE2 and od primary slave on IDE1..and again..the same problem. I have windows xp professional, and I burn with nero 6 and also I tried DVD Shrink for burning DVD-s..and same problem. Please...I nead help..Thanx. Sorry about the bad english..