I am running a crap (IMO) Iomega Predator USB 4x CDRW and Nero 5.5.4.0 here at work and when I create a disc as a multisession disc it works fine but when I go to add another session to it it tells me that I need to put in a good disk with room, I have room on the disk and I have set it to write multisession, these discs even do this on another machine with Easy CD Creator, so I am sure it closing the disc. Anyone have any suggestions or know anything about these burners besides the fact that they are slow and picky about the type CDRs?