Code for Buttons - Works in One Scene but Not Another

Ok, I’m not quite understanding this. Here is the code that I have put in my Actions layer:


stop();

btn_1.onRelease = function (){
 this.gotoAndStop(2);
};

btn_2.onRelease = function (){
 this.gotoAndStop(3);
};

btn_3.onRelease = function (){
 this.gotoAndStop(4);
};

btn_4.onRelease = function (){
 this.gotoAndStop(5);
}; 

The buttons don’t work - at all. I’ve used this code in a separate scene for a skipIntro button, and it worked fine… Can anyone see anything wrong here? Am I supposed to enter the code elsewhere?

Thanks!