Thank you. I got a directly answer - and the problem is in the computer, not in the program:
In some way the computer is set, so it plays any sound less split in stereo, than it realy is. It is not in mono - but it is less stereo, than if I make a CD and play the same sound/music there.
Now the problem just is how I change this on the computer. But I suppose this is not the right place to ask for that? Or?
Thank you any way.