Thanks Raze !
I go try first to re-install DD and see or it helps
I also send GOG a e-mail about this issue! Hope they can give me also some extra advise

.
One question:
can I "see" in de DD folder where the "music" must be? Maybe I can "see" that some ingame songs aren't in that folder(?) so I know the install wasn't going correct!
Best I can shut down my anti-virusprogram too? Or better not?