[問題] AS3 存取未定義的屬性 Keyboard。

[aprilcoffee (凌晨三點的咖啡)]

請問一下發生了什麼問題??QQ

C:\Users\Mac\Desktop\成發\down.as，字行 20
1120: 存取未定義的屬性 Keyboard。

package  {
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.display.Stage;
    import flash.events.MouseEvent;
    import flash.events.KeyboardEvent;
    public class down extends MovieClip{
                private var s:Stage;
                public function down(v:Number,s:Stage) {

                s.addEventListener(Event.ENTER_FRAME,moving)
                s.addChild(this);
                this.y = 300;
                this.x = 800;
                function moving(e:Event){
                this.x -=v;
                if(this.x<191){s.addEventListener(KeyboardEvent.KEY_DOWN,cp);}
                   function cp(q:KeyboardEvent){
                        if(q.keyCode == Keyboard.DOWN)s.removeChild(this);
                        }
                }
                }


        }

}

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→ Kcars:import flash.ui.Keyboard ;