I have a Slimtype DVDRW SOSW 825S PS08 which is not writing to DVD-R. I upgraded the firmware on the Liteon site to PSX3 and this still didn't work.
I have tried TDK DVD-R and Vebatim DVD-R.
When I have tried burning anything with DVD Decrypter it says there is a 'I/O Error' and there is an Invalid Field in Parameter List. Sonic RecordNOW instantly ejects the disk saying there is a writing error.
I can write the same files easily on DVD+RW.
I've searched the net, but nothing.