Error #2025 twice - actionscript-3

Question

package
{
import flash.display.MovieClip;
import flash.events.Event;
import flash.ui.Keyboard;
import flash.events.KeyboardEvent;
import flash.events.MouseEvent;
public class supportForce extends MovieClip
{
private var Player1Child:Player1Actual = new Player1Actual();
private var Player2Child:Player2Actual = new Player2Actual();
private var GreenLightLeft:Projectile1 = new Projectile1();
private var GreenLightRight:Projectile2 = new Projectile2();
private var NeonChild:mcNeonPlayer = new mcNeonPlayer();
private var _keyDownStatus:Object = {};
private var defaultSpeed:int = 10;
private var Player1Lock:Boolean = false;
private var Player2Lock:Boolean = false;
private var Player1Left:Boolean = false;
private var Player2Left:Boolean = true;
private var greenLightLeft:Boolean = true;
private var Player1CD:int = 0;
private var Player1Ready:Boolean = true;
private var Player1Hit:Boolean = false;
private var Player1X:int;
private var Player1Y:int;
private var NeonX:int;
private var NeonY:int;
private var NeonCD:int = 0;
private var NeonDuration:int = 240;
private var NeonUse:Boolean = false;
public function supportForce()
{
this.addEventListener(Event.ENTER_FRAME, general);
stage.addEventListener(KeyboardEvent.KEY_DOWN, onDown);
stage.addEventListener(KeyboardEvent.KEY_UP, onUp);
stage.addEventListener(Event.ENTER_FRAME, keyCheck);
btnStart.addEventListener(MouseEvent.CLICK, clickStart);
btnAbout.addEventListener(MouseEvent.CLICK, clickAbout);
btnDust.addEventListener(MouseEvent.CLICK, clickDust);
}
private function general(event:Event)
{
Player1X = Player1Child.x;
Player1Y = Player1Child.y;
NeonX = NeonChild.x;
NeonY = NeonChild.y;
GreenLightLeft.x -= (defaultSpeed * 2);
GreenLightRight.x += (defaultSpeed * 2);
//status_text = NeonCD;
if (NeonDuration > 0 && NeonUse == true)
{
NeonDuration -= 1;
}
else if (NeonDuration == 0 && NeonUse == true)
{
NeonUse = false;
removeChild(NeonChild);
addChild(Player1Child);
Player1Child.x = NeonX;
Player1Child.y = NeonY;
}
if (NeonCD > 0)
{
NeonCD -= 1;
}
trace(NeonCD);
if (Player1Child.BladeInstance.hitTestObject(Player2Child) && Player1CD <= 0 && Player1Child.BladeInstance.alpha != 0)
{
if (Player1Left == true)
{
Player2Child.x -= defaultSpeed;
Player1Hit = true;
Player1CD = 8;
//trace("G");
}
if (Player1Left == false)
{
Player2Child.x += defaultSpeed;
Player1Hit = true;
Player1CD = 8;
//trace("G");
}
}
if (Player1Ready == false)
{
Player1CD -= 1;
}
if (Player1CD <= 0)
{
Player1Ready = true;
Player1CD = 0;
}
else
{
Player1Ready = false;
}
if (Player1Left == true)
{
if (Player1Child.x <= (0 + Player1Child.width))
{
Player1Child.x = (0 + Player1Child.width);
}
if (Player1Child.x >= 550)
{
Player1Child.x = 550;
}
if (Player1Child.y >= 400)
{
Player1Child.y = 400;
}
if (Player1Child.y <= (0 + Player1Child.height))
{
Player1Child.y = (0 + Player1Child.height);
}
}
else if (Player1Left == false)
{
if (Player1Child.x <= 0)
{
Player1Child.x = 0;
}
if (Player1Child.x >= (550 - Player1Child.width))
{
Player1Child.x = (550 - Player1Child.width);
}
if (Player1Child.y <= 0)
{
Player1Child.y = 0;
}
if (Player1Child.y >= (400 - Player1Child.height))
{
Player1Child.y = (400 - Player1Child.height);
}
}
if (Player2Child.x <= Player2Child.width)
{
Player2Child.x = Player2Child.width;
}
if (Player2Child.x >= 550)
{
Player2Child.x = 550;
}
if (Player2Child.y >= (400 - Player2Child.height))
{
Player2Child.y = 400 - Player2Child.height;
}
if (Player2Child.y <= 0)
{
Player2Child.y = 0;
}
}
private function onUp(e:KeyboardEvent):void
{
_keyDownStatus[e.keyCode] = false;
}
private function onDown(e:KeyboardEvent):void
{
_keyDownStatus[e.keyCode] = true;
}
private function keyCheck(event:Event)
{
if (_keyDownStatus[37])
{
if (Player1Left == false)
{
Player1Left = true;
Player1Child.rotation += 180;
Player1Child.y += (Player1Child.height - 5);
Player1Child.x += Player1Child.width;
}
Player1Child.x -= defaultSpeed;
}
if (_keyDownStatus[39])
{
if (Player1Left == true)
{
Player1Left = false;
Player1Child.rotation += 180;
Player1Child.y -= (Player1Child.height - 5);
Player1Child.x -= Player1Child.width;
}
Player1Child.x += defaultSpeed;
}
if (_keyDownStatus[38])
{
Player1Child.y -= defaultSpeed;
}
if (_keyDownStatus[40])
{
Player1Child.y += defaultSpeed;
}
if (_keyDownStatus[96] && Player1Ready == true)
{
Player1Child.play();
Player1Ready = false;
}
if (_keyDownStatus[97] && NeonCD <= 0)
{
removeChild(Player1Child);
stage.addChild(NeonChild);
NeonChild.x = Player1X;
NeonChild.y = Player1Y;
NeonCD = 480;
NeonUse = true;
Player1Lock = false;
}
if (_keyDownStatus[65])
{
if (Player2Left == false)
{
Player2Left = true;
Player2Child.rotation -= 180;
Player2Child.y -= (Player2Child.height - 5);
Player2Child.x -= Player2Child.width;
}
Player2Child.x -= defaultSpeed;
}
if (_keyDownStatus[68])
{
if (Player2Left == true)
{
Player2Left = false;
Player2Child.rotation += 180;
Player2Child.y += (Player2Child.height - 5);
Player2Child.x += Player2Child.width;
}
Player2Child.x += defaultSpeed;
}
if (_keyDownStatus[87])
{
Player2Child.y -= defaultSpeed;
}
if (_keyDownStatus[83])
{
Player2Child.y += defaultSpeed;
}
if (_keyDownStatus[90])
{
if (Player2Left == true)
{
var GreenLightLeft:Projectile1 = new Projectile1();
stage.addChild(GreenLightLeft);
GreenLightLeft.x = Player2Child.x;
GreenLightLeft.y = Player2Child.y;
greenLightLeft = true;
}
if (Player2Left == false)
{
var GreenLightRight:Projectile2 = new Projectile2();
stage.addChild(GreenLightRight);
GreenLightRight.x = (Player2Child.x);
GreenLightRight.y = (Player2Child.y - Player2Child.height);
greenLightLeft = false;
}
}
}
private function clickStart(event:MouseEvent):void
{
gotoAndStop(2);
}
private function clickAbout(event:MouseEvent):void
{
}
private function clickDust(event:MouseEvent):void
{
}
}
}
It works perfectly when I press Numpad 1 (97) but the second time, it gives this error.
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at supportForce/keyCheck()
So I planned of removeing the NeonChild after 10 seconds or 240 frames but it gives this error.
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at supportForce/general()
If you cannot understand what I am trying to say, this is the link to the actual .fla and .as
files

Answer 1

if you dont know parent of displayObject, which you want to remove you can write
mc.parent.removeChilte(mc);
where mc is movieclip , which you want to delete

Answer 2

Use this instead
this.parent.removeChild(mc);
where mc is the MovieClip.