Sony DVD RW DW-U12A Problem

I have got a:

and i have been burning some dvd’s!

when finalizing the dvd i get a error:

anyone have any ideas what this could be?
seemed like a hw issue

i have the latest firmware for my drive.

thx i hop u can help me

it fails to finalize in Nero also
so its not the software :frowning:

use differrent media??