I just recently got a good deal on a spindle of memorex -r 4x's and am having some diffuculties. When I open Nero, it doesn't even recognize that I have a blank in the drive (Pioneer DVR-106D External). I never once had a problem w/ the TDK DVD-R's I did use, so I don't know what to think. Is it the drive? The media? Both? Is there anything I can do?? Thanks!