simple play button

Hi.  I have an animated story for children.  I simply want the animation to stop at different points and continue when I click a play button.   I've placed stop actions on the main timeline stop(); and I have a play button (instance name PlayButton)with the script below that works fine

//Play Function
function ClickPlay(Event:MouseEvent){
play();
}

//Call Play Button
PlayButton.addEventListener(MouseEvent.MOUSE_UP, ClickPlay);

However a problem occurs at scene 2.  I assumed I could simply use the same button and script but it doesn't work.  Do I need to make a new button with a different script for different scenes?

I know this is very basic but it's driving me mad