Trouble with sound using Actionscript

programming flash
1

I’m using this script to play sounds when hitting a playbutton:

[FONT=Courier New][SIZE=2] [COLOR=Black]on (release) {[/COLOR]
[COLOR=Black] mySound = new Sound(this);
mySound.attachSound(“soundfile”);
mySound.start(0, 1);
}

How can I make this script better so the soundfile will not start over and over again when hitting the playbutton?

[/COLOR][/SIZE][/FONT]