Has anyone encountered a "Cannot simulate" error when trying to test writing speed on a DVD+R/RW blank using Nero CD/DVD Speed? I have version 2.20 installed, and have two IDE DVD burners, TDK 440N and NEC ND-2500A. Blank DVD-Rs test fine. I can't recall whether I ever tried doing it before so I'm not sure if it's always been this way or if this is a recent problem.