[flexcoders] Why MouseEvent.Click Event doesn't work

[mouhong.lin]

Hi, I'm a Flex beginner.

Here I want a shape(_shape) to move while I'm clicking another
shape(_goRight).

ActionScript Code:

public class Move extends Sprite
  {
       private var _goLeft:Shape;
       private var _goRight:Shape;
       private var _shape:Shape;
       private var _sprite:Sprite;

       public function Move()
      {
        _goRight = new Shape();
        _goRight.graphics.lineStyle(2, 0xffffff);
        _goRight.graphics.beginFill(0);
        _goRight.graphics.lineTo(30, 15);
        _goRight.graphics.lineTo(0, 30);
        _goRight.graphics.lineTo(0, 0);
        _goRight.graphics.endFill();

        _shape = new Shape();
        _shape.graphics.lineStyle(2, 0xffffff);
        _shape.graphics.beginFill(0);
        _shape.graphics.drawRoundRect(0, 100, 50, 30, 5, 5);
        _shape.graphics.endFill();


       //add event listener
        _goRight.addEventListener(MouseEvent.CLICK, onLeftClick);

        this.addChild(_goRight);
        this.addChild(_shape);

      }

       private function onLeftClick(event:MouseEvent):void
      {
           _shape.x += 5;
      }

}

But when I click shape "_goRight", nothing happens. Why? I need a help!