Dru-500a problem recording dvd-r 4x

[Loureiro]

I have a dru-500a(firmware 2.0f) and i can't record dvd-r 4x(medianca-manufacturer longten), i've already recorded some with any problems, but now it appears a write error in nero 6.0.0.19, and in recordnow and dvddecrypter in test mode, it writes until 10% to 13%, sometimes a litle more and then appears the write error (i already tried in 1x, 2x and 4x record speed, same error).
Any solution?

[Loureiro]

Problem resolved; with nero, recordnow and dvddecrypter can't write but with copytodvd theres no problem, strange no?
If any out there as similar problem try copytodvd.