Hej!
The writer has no support for that media code/disc id in the firmware, so it's using a generic write approach and obviously that doesn't work very well.
There is a later firmware you could try with.
http://www.firmwarehq.com/NEC/ND-3450A/files.html
There are some more here that might support that media code.
http://liggydee.cdfreaks.com/page/en/NEC-ND-3500A/
The burner is a bit old and support for DL media was not very good implemented back in those days.
Genuine Verbatim media usually works best with those old ones.