DVD Burning problems using GSA-4163B

I have several unreadable DVDs (Benq and Misumi 4x DVD+Rs) that were burned using GSA-4163B and Nero.
Basically, the burning process was successful according to Nero. However, when I try to read from one of them, the light on the burner was flashing like crazy for a long time I had to eject the DVD to stop. I also tried to read the whole track using Nero, it returned read errors on some blocks.

I also tried to read those DVDs on my laptop with a DVD-ROM, failed too.

I am just wondering if anyone has the same problem as me.