Benq 1650s dvd rom

hey all

i want to know if someone else has the same probs with this drive
its very picky with backup’s i made with sd2 disks
i have build two pc’s for my children and they play only backupdisks (orgs in the safe) have tosh cdrom works fine tosh dvd rom works fine so wat is going on the firmware is 5dv i can upgrade with newer version (for more compatility with protected disks the say) but its a win flasher so you can’t downgrade i think.

tried mtkflash to backup firmware first but it keeps on reading for ever(so that doesn’t work)