Stop sound to start another sound

1

I have a movie -a read aloud ebook for kids-with a main soundfile, and buttons with soundfiles (definition of the word in the text). I need to be able to click on the word definition button, stop the main soundfile, listen to the word definition button soundfile, then return to the main soundfile. Everything in the movie works perfectly except that with the code below (on each button), on rollOver ALL sounds are stopped, and I can’t work out how else to do it. Can anyone show me how to do this without the onRollover please?

on (rollOver) {
stopAllSounds();
}
on (press) {
_root.play();
}
on (release) {
_root.stop();
_root.btnStopPlay.attachMovie(“mcButtonPlay”, “btnPlay”, 1);
}