You are on your own with this one !!!
Hi Saber_Rider again
You say " i have successfully burnt verbatim cdrs at 6x with my old firmware 1.50. i updated it to 1.80 in order to clone protections because it gave my writer dao support."
Well I think you have answered your own question once again. Your problem is with the firmware it probably dosen't recognise the Media correctly with the new firmware. With the price of Writers I supprised you don't buy a new one with all the burning you say you are doing !!!
Always remember to Pillage BEFORE you Burn