Hi Kyatric and thanks for the reply.
Yes, I set the preloading of all sounds on start, because it is a music composition game, and there is only one layout. So I'm afraid every sound should be available on start if possible. :-/
Maybe could I delay the loading of some sounds a couple seconds after the layout appears, loading them manually in the event sheet if that's possible. But overall I need most of them from the very beginning of the game, or the player will just quit, thinking it doesn't work.
Here is the latest build of the game, if it could help you see what it's all about : http://test.smurf.com/musicgame23/
As you will probably see, the loading is VERY slow. Most of the time it even fails and should be restarted several times before being able to play (due to the server problem this post is about).