I have an Optiarc DVD RW AD-7201S and I'm having problems burning a dual layer iso/mds. I read and followed the guide on NEC/Optiarc drives, but it still doesn't work. I've set the booktype to DVD-ROM via the icon in the Read mode and it set itself as Active and when I was burning the disc, the status window did list the booktype as DVD-ROM. But when I checked the burned disc, the booktype remained DVD+R DL. Also, when I look at the Change Book Type menu now, under "Drive (For DVD+R DL Media)" it says "This setting is NOT active".
What am I doing wrong?