I just purchased a new 106 writer, and i am unable to burn anything at 4x. I have tryed several programs, and they all quit about half way through with some kind of error. The latest version of Nero says "communication error". If i reboot my computer and burn in Nero at 2x and dont touch anything it usually works, but this method has still made a few coasters. I have a 1.6Ghz system with 256MB ram, a fresh copy of winXP pro on a 20Gig NTFS partition, and the hd and dvr are each on their own ide channel with DMA enabled. I am burning to memorex x4 -r media, but i dont think this is the problem, since it seems to be some kind of buffer problem. Shouldnt the buffer underrun protection prevent a "communication error"? I feel like i have tried everything, and my stack of coasters is getting larger than my stack of backups. has anybody else had this kind of problem?