Target object on stage from within Class

Question

Hi,
I have a custom class which uses some buttons on the stage. Or at least is trying to.
say have this code in the customClass.as file
package{
     import flash.events.*;
     import flash.display.MovieClip
     public class customClass{
          public function customCLass (){
               btn.addEventListener(MouseEvent.MOUSE_OVER , btnOVER);
          private function btnOVER (e:MouseEvent):void{
              btn.gotoAndStop('over');
The Lines marked in red throw me this kind of error:
1120: Access of undefined property btn.

Answer 1

I am creating the class in a sepparate file.
when i create an object in this class i pass another object to the class from the timeline. That returns no errors.
I create objects from the timeline like this:
var object:customClass = new customClass();