DVDR-106D error reading on standalone player

hi
i have a 106d and i have a problem of reading the end of dvd on standalone player (stopping scratching) confirm by analyse the dvd-r
i have the last firmware 1.08
burn with nero 6.3.1.17 same problem with older version
burn on dvd-r, with princo or datasafe, bullpack…

the reading is perfect with a dvd-rw
nero doesn’t show any burning problems

thanks for you help. I’m pissed off with technical service
about compliant dvd-r, have just one burning application …
nothing change

so it seems that the problem came from my motherboard Asus P4P800 deluxe
so after an update of the bios i have no problem
i cross fingers…