Problems erasing dvdrw

I have a Problem I cant erase dvdrw or cdrw with my pioneer dvdr 112d, has anyone had this prob? I have tried diffrent makes of disks and burning programs. I have also flashed to the latest Pioneer firmware v1.21 still no luck.

Uninstall Alcohol software.

Hi Chef,
I tried uninstalling all my burning progs no joy, reinstalled Wins and it works ok. So thanks for your advice, the rubbish left behind from Alchol must have been the prob like you said. Many thanks again, I was close to sending the drive back. By the way super fast drive great at 16x no coasters yet lol.

Somethimes software quirks can drive younuts…