ActionScript 3.0 :: Add Click Event Listener Inside Object?

I'm trying to add an event listener inside an object but it doesn't seem to work. other OO languages it makes sense for an object to be able to attach events etc itself rather than have some external action do it.Here's an example of what I'm trying to do:

ActionScript Code:
package {
import flash.display.MovieClip;
public class Player extends MovieClip {

[CODE]....

This gives an error "1120: Access of undefined property MouseEvent." suggesting that I don't have access to MouseEvent from within the instansiated object.What I can do is create an instance of the class from the Document Class for example and then do the following:

ActionScript Code:
newInstance.addEventListener(MouseEvent.CLICK, newInstance.mouseClick);