Problems forwarding movie, sound still plays

Okay, i need help with this…
I have a few mc’s from frame 1 to 100… Which have audio in them…
Now, when i made a ‘skip intro’ button which ‘goes to an plays’ at frame 101, the movie forwards to frame 101, but all the sounds in the mcs in the previous 100 frames play together…

I tried putting that ‘stop all sounds’ command on frame 101, but still the sound still plays for 1/100th of the second… What should i do to fix that?