Burning error with Pioneer DVR-K14L and Verbatim DVD+R 16x certified media

I use Nero 6.3.

I tried to burn two Verbatim 16x certified DVD+R (super-azo +). Each time it failed at the end. It looked like Nero was waiting for the drive and the drive didn’t answer. Then after 10 minutes, Nero says “Burning failed at 4x speed.” The DVD+R cannot be read nor written again.

I found in forums that this may be a bug in my Pionner firmware, but there isn’t any update available.
Indeed, in linux forums someone says that it’s a bug such as drive not answering correctly to Nero.

Burning Philips 4x DVD+RW works and burning Verbatim 8x DVD+R works. I also found that when using Verbatim 8x DVD+R, Nero shows 8x as max writing speed, whereas with Verbatim 16x DVD+R, it shows only 2.4x and 4x writing speeds.

Please could someone help me?

Your best chance would be to update Nero or use another burning app, IMO.