The problem is that the burner didn't work after installation, neither reading normal discs nor burning, error message. First i wanted to add the cdburner under the writer but found out that the two holes for the flat cable were full - the cdwriter took one and the other was occupied by something that seemed to be the ploppy device. Since the cables were there I could just note how they were connected to the motherboard, the 40pin flatcable. I removed the writer and I connected them in the same way as the writer.
Maybe the motherboard isn't supposed to support any other device than the original ones?  The burner is a normal new LG and the computer not so old, about 5 years.

                         PCBUILD's List Owners:
                      Bob Wright<[log in to unmask]>
                       Drew Dunn<[log in to unmask]>