I'd remove Drag-N-drop from your system.
Ricoh W11 is 4x media in that drive, and should work very well. That said, all RW media is subject to "issues" and can sometimes go bad. Suggest you do a couple cycles of quick erase - full erase with CDSpeed or Nero and try it again.
Having Roxio and Nero products on one system isn't a great idea, but it does work for some folks. Having anything but InCD for packet writing is a bad idea, and even InCD is questionable.
If you really want to do drag-n-drop type stuff, I'd get an LG burner and some RAM discs.