Philips PBDV1640P

Hi everyone, has anybody got an idea what is causing this problem with my philips PBDV1640P?
i’m using datawrite yellows -r x8, i’ve burned over 200 discs without any problems but now this problem has started. when i turn my computer on it will burn a dvd-r just fine, but it won’t burn the second, i have to restart to get it to work again but only one disc then restart again.


i hope someone can help