Make Buttons Link To Pages In Different MovieClip

I'm just picking up flash and I am trying to make a new menu of buttons in the template and I will be changing the menu that is already there, but it isn't using conventional menu coding. This is the piece of code I am trying to use for my button to lead to a different movie clip to a different frame than the one the buttons are sitting in, a separate movie clip.

stop();
customhms_btn.addEventListener('click', function(e:MouseEvent):void{
gotoAndStop('customhomes');
});

Of course there are more buttons, this is just one. Customhomes is the frame label, customhms_btn is the instance name. It tells me that customhms_btn is not defined. I have this code sitting in the movie clip that the buttons are in by itself in the first layer.