Problems burning with 721sa

I have my 712sa connected to the SiI3112 on my Abit IC7 G. I have no problems burning most files to DVD/CD.

The problems arise when I try to burn ISO, MDF ,etc files.

21:20:32 Source Info: Session: 1, Track: 11, Length: 596.6 MB / 067:52:52
21:20:32 (M:) PLEXTOR DVDR PX-712A(2:0): Recording Method/Speed
21:20:32 Simulated recording - DAO / SAO - 16X (2400 KB/Sec)
21:20:32 (M:) PLEXTOR DVDR PX-712A(2:0): BURN-Free activated
21:21:48 (M:) PLEXTOR DVDR PX-712A(2:0) - [Write ERROR], LBA: 71380, Length: 16
S:KEY - 00/00/00 - “No Additional Sense Information”
21:21:49 (M:) PLEXTOR DVDR PX-712A(2:0): Simulated recording failed!
21:21:49 Image file loading aborted!

Also I have no problems burning files including the ISO, MDF, etc. files when the burner is connected to the Intel ICH5R.

The problem must be with the SiI3112, but I can’t find out why.

My motherboard is not on the Plextor compatibility list, but another board(NF7) is with the SiI3112. Perhaps there is some difference with the drivers between the two boards.

Any ideas on my problem?? Thanks.

no takers?