ActionScript 3.0 :: Movie Not Playing When Button Clicked?

I want to link a button to a movie clip, but it will not play. Here is how it is set up. On my main scene on second layer on frame 2, I have a movie called homeContent within which I have another movie called pdbutton within which I have another movie called pdrbt. This movie called pdrbt needs to play a movie on the main scene on layer content on frame 3 movie called streetSidemc_mc. Here is my code,

function playMovie(event:MouseEvent):void {
pdrbt.play();
}
pdrbt.addEventListener(MouseEvent.CLICK, playMovie);