OK trying to integrate sound on/off button in Flash. Isnt working for some reason....

3 Frames:

1st Frame - var snd = new Sound();
snd.attachSound("mysound");

2nd Frame - on(release)
{
_root.snd.start(0, 10);
}

3rd Frame - on(release)
{
_root.snd.stop();
}

I have set the sound file in the library to the name mysound and export to action scripts. Anyone see the problem? The button appears and has the mouse over, but when clicked nothing happens.