Stopping an individual sound

programming flash
1

Hi Im trying to stop and play an individual sound. with the code below.

Play button has this code

on (press) {
mySound = new Sound();
mySound.attachSound("rita");
mySound.start(0,1);
}

Stop button has this code

on (release) {
mySound.stop();
}

My problem is that when I press the stop button it stops all the sounds that are playing instead of just targeting mySound. Is there away to just stop this one sound without effecting others?