Tengo un evento personalizado que se envía cuando se mueve un control deslizante, pero no recibo ningún evento de la clase de despachador heredada que creé, mientras que seguí la misma sintaxis como solución paraMi evento personalizado flash no activa

Clase de evento:

package {

    import flash.events.Event;

     public class CustomEvent extends Event
     {
            public static const ON_DISPATCHER_EVENT = "onDispatcherEvent";
        public var value:Number;

        public function CustomEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false):void
        {
           super(type, bubbles, cancelable);
        }

     }

}

Despachador

package {

    import flash.events.EventDispatcher;
    import flash.events.Event;

    public class CustomEventDispatcher extends EventDispatcher {

        private var cEvent: CustomEvent;      

        public function CustomEventDispatcher() {

        }

        public function raiseEvent(_value:Number) {
            cEvent = new CustomEvent(CustomEvent.ON_DISPATCHER_EVENT);
            cEvent.value = _value;
            dispatchEvent(cEvent);                      
        }

    }
}

Clase de prueba:

package {

    import flash.display.*;
    import flash.net.*;
    import flash.events.*;
    import fl.events.SliderEvent;
    import fl.controls.Slider;

    public class TestCustomEvent extends MovieClip {        

      private var cEvent: CustomEvent;

      public function TestCustomEvent() {   

        addEventListener( Event.ADDED_TO_STAGE, init);  

      }

      public function init( e:Event ):void {

        removeEventListener( Event.ADDED_TO_STAGE, init );

        this.addEventListener(CustomEvent.ON_DISPATCHER_EVENT,OnDispatcherEvent);

        slider.addEventListener(SliderEvent.CHANGE,OnSliderEventChange);

      } 


      public function OnDispatcherEvent(event:CustomEvent): void {

            trace(event.value);
      }


      public function OnSliderEventChange(event:SliderEvent) {

            cEvent = new CustomEvent(CustomEvent.ON_DISPATCHER_EVENT);
            cEvent.value = event.value;
            dispatchEvent(cEvent);
                    trace("hello");

      }

    }       
}