Controlling an external sound clip

1

I’ve got a movie that’s loading another into a container (instance name musicContainer). The movies that are loading are simple 1x1px movies that I’m using to house some music. What I’d like to have is a simple play / pause for that music that’s loading externally. Here’s what I’ve got for code:


mcMute.onRelease = function() {
    if (this.musicContainer.getVolume() == 100) {
        this.musicContainer.setVolume(0);
        mcMute.gotoAndStop(2);
    } else {
        this.musicContainer.setVolume(100);
        mcMute.gotoAndStop(1);
    }
}

Do I need to reference the external clip at all or can I call it through the movieclip that it’s loading to? I’m missing something here.