A term is undefined and has no properties

I have this error on this line

// listener
this.addEventListener(Event.ENTER_FRAME, frameHandle, false, 0, true);      <--- this is the line that has the error

These are the handles

// listener
private function frameHandle(event:Event):void {
if (isSystemPaused() == false) {
// basic
movingHandle();
actionHandle();
positionHandle();
updateMiniMap();
flyingHandle();
pushHandle();
updateHealthBar();
// attack
unitHitTestHandle();