GTA: San Andreas - NoCD Problems

[Superwindhund]

hi,
i have a problem with the sound and wanted to know if there is someone with a similar one.
when i start the game, everything workd fine but when i start a "new game", there is no sound in the intro (where cj is getting caught). after the intro i have to ride the bike an the whole ingame sound works without problems, but when i get in the car and try to switch the radio channel, ther is no sound and also the user tracks didn't work.

can somebody tell me if you had the same problem or someone know why its not working?

thanks.
d.p