Help with AS3 script shooting bullet

[conquistadores]

Hey I hope anyone can help me with my problem here. Been stuck for a week now.

I am trying to create a bullet platform shooting game like mario. But for some reason the bullet doesn’t wants to be removed from the scene and it keeps popping up this error message

I have 2 classes for this bullet effect the main and the bulletMC

3 symbol, the bulletMC, characterMC and the canon inside the characterMC

here is the code
Main.as

package 
{

	import flash.display.MovieClip;
	import flash.text.engine.GraphicElement;
	import flash.events.MouseEvent;
	import flash.events.KeyboardEvent;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.geom.Point;
	import flash.ui.Keyboard;
	import flash.utils.Timer;
	import flash.events.TimerEvent;


	public class Main extends MovieClip
	{
		//bullet var
		private var bulletFire:Boolean = false;
		var canShoot:Boolean = true;
		var bulletTimer:Timer;
		private var bullet:bulletMC;
		//canon
		var canonAngle:Number = 0;
		var facingLeft:Boolean = true;

		private var _bullets:Array;


		public function Main ()
		{
			_bullets = new Array();
			_bullets = [];
			stage.addEventListener ("bulletCreated", BulletCreated);

			stage.addEventListener (MouseEvent.MOUSE_MOVE, canonMove);
			stage.addEventListener (Event.ENTER_FRAME, EnterFrame);
			stage.addEventListener (MouseEvent.MOUSE_DOWN, bulletOut);
			stage.addEventListener (MouseEvent.MOUSE_DOWN, bulletReload);
		}
		private function BulletCreated (event:Event)
		{
			//Add new bullet to the _bullets array
			_bullets.push (MovieClip(event.target));
			trace (event.target.name);
		}
		public function EnterFrame (e:Event)
		{
			bulletDisplay.text = "Bullets on the stage: " + String(_bullets.length);

			for (var i:int = 0; i < _bullets.length; i++)
			{
				if (_bullets*.y + _bullets*.height / 2 < 0)
				{
					removeChild (_bullets*);
					_bullets.splice (i, 1);
					i--;
				}
				else if (_bullets*.y - _bullets*.height / 2 > stage.stageHeight)
				{
					removeChild (_bullets*);
					_bullets.splice (i, 1);
					i--;
				}
				else if (_bullets*.x + _bullets*.width / 2 < 0)
				{
					removeChild (_bullets*);
					_bullets.splice (i, 1);
					i--;
				}
				else if (_bullets*.x - _bullets*.width / 2 > stage.stageWidth)
				{
					removeChild (_bullets*);
					_bullets.splice (i, 1);
					i--;
				}
			}
		}
		//canon 
		public function canonMove (e:MouseEvent)
		{
			var mousex =  -  mouseX + charMC.x;
			var mousey =  -  mouseY + charMC.y;
			var canonRadian = Math.atan2(mousey,mousex);
			canonAngle = canonRadian/(Math.PI/180);
			checkCanon ();
		}
		private function checkCanon ():void
		{
			if (facingLeft)
			{
				if (canonAngle >= 45 && canonAngle < 90)
				{
					canonAngle = 45;
				}
				if (canonAngle <= -45 && canonAngle > -90)
				{
					canonAngle = -45;
				}
				if (canonAngle <= 45 && canonAngle >= -45)
				{
					charMC.canonMC.rotation = canonAngle;
					charMC.canonMC.alpha = 1;
					canShoot = true;
				}
				else if (canonAngle > 90 || canonAngle <= -90)
				{
					charMC.canonMC.rotation = 0;
					charMC.canonMC.alpha = 0;
					canShoot = false;
				}
			}
			else
			{
				if (canonAngle >= -135 && canonAngle <= -90)
				{
					canonAngle = 135;
				}
				if (canonAngle <= 135 && canonAngle >= 90)
				{
					canonAngle = 135;
				}
				if (canonAngle >= 135 || canonAngle <= -135)
				{
					charMC.canonMC.rotation = canonAngle;
					charMC.canonMC.alpha = 1;
					canShoot = true;
				}
				else if (canonAngle < 90 && canonAngle > -90)
				{
					charMC.canonMC.rotation = 0;
					charMC.canonMC.alpha = 0;
					canShoot = false;
				}
			}
		}

		private function bulletOut (e:MouseEvent)
		{
			if (! bulletFire)
			{
				shootBullet ();
				bulletFire = true;
			}
		}
		private function bulletReload (e:MouseEvent)
		{
			bulletFire = false;
		}
		private function shootBullet ()
		{
			var bullet_SX:Number = Math.cos(canonAngle * Math.PI / 180) * -10;
			var bullet_SY:Number = Math.sin(canonAngle * Math.PI / 180) * -10;

			var bulletX:Number = charMC.x - 70 * Math.cos(canonAngle * Math.PI / 180);
			var bulletY:Number = charMC.y - 70 * Math.sin(canonAngle * Math.PI / 180);

			var bullet:bulletMC = new bulletMC(bullet_SX,bullet_SY,bulletX,bulletY);
			parent.addChild (bullet);
		}

	}

}

bulletMC.as

package 
{
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.display.Stage;

	public class bulletMC extends MovieClip
	{
		private var _sx:Number;
		private var _sy:Number;
		private var _ax:Number;
		private var _ay:Number;
		private var _angle:Number;

		public function bulletMC (sx:Number,sy:Number,startX:Number ,startY:Number)
		{
			this._sx = sx;
			this._sy = sy;
			this.x = startX;
			this.y = startY;
			
			addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
		}
		private function onAddedToStage (e:Event)
		{
			addEventListener(Event.ENTER_FRAME, EnterFrame);
			addEventListener(Event.REMOVED_FROM_STAGE, RemovedFromStage);
			
			dispatchEvent(new Event("bulletCreated", true));
			
			removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
		}
		private function RemovedFromStage(event:Event):void
		{	
			removeEventListener (Event.ENTER_FRAME, EnterFrame);
			removeEventListener(Event.REMOVED_FROM_STAGE, RemovedFromStage)
		}
		private function EnterFrame(event:Event)
		{
			rotation += 20;
			
			x += _sx;
			y += _sy;
		}
	}

}

Just started recently in the as3 field. Hope anyone can help me with these!
I would be really happy if anyone can suggest any improvement to my code.

THANKS!!