Trouble was in the multiboot config. I've been rebuilding the same disk for several months now, don't know how this error slipped in. Rebuilded the DVD about 20 times the past days, each time leaving out a step/package out of my proces to eliminate the problem. Finaly I realized thanks to you all that my proces was the problem. So I started from scratch with the clean setupCD's and the Batchcopy files from the Multiboot section of this forum. Problem solved