I bought a template

I baught a template. with a background sound and I need it when I click a button it stops the background sound and starts a song thats in the library, this is what I got but it only stops the background music but the other music wont play.


on (release) {
    s = new Sound();
    s.attachSound("a");
    s.start(0, 2);
    _root.soundstatus = "off";
}

Can somone please help?