To jcambece, both IDE channels are in DMA when available.
To wanderer, I expect windows to recognize the blank cd, but it simply doesnt.
So if i put a blank CD-R and go into Nero, Nero says no disc (Opens the tray, thinking there was no disc inserted). But when i put a CD-R with some data in it, and want to burn more, it is recognized by both Windows and Nero, and i can copy files and burn them.
All the other stuff works, just the Blank CD-R is not recognized. (when its not recognized not only windows, but Nero also says there is no Disc inserted)
Thnx to both of you for trying to help.