Problem removing eventListener/function?

1

Hi there i have a problem with trying to remove animated clouds i have created when i enter a new ‘scene’ or frame.

Here is an example of what im trying to say:

import fl.transitions.Tween;
import fl.transitions.easing.*;
import fl.transitions.TweenEvent;

var xspeed:Number = (Math.random() * 0.9);
var cloud_array:Array = new Array();

//Clouds Moving Left
for (var i:Number = 0; i < 5; i++) {
setCloud();
}
//draw cloud. set in random position
var cloud_mc:MovieClip;
function setCloud():void {
var cloud_mc:MovieClip = new MovieClip();
cloud_mc.graphics.lineStyle(1, 0xD6D2D2, 1);
cloud_mc.alpha = 0.7;
cloud_mc.graphics.beginFill( 0xD6D2D2, 10 );
cloud_mc.graphics.moveTo(0,70);
cloud_mc.graphics.curveTo(20,50, 40,60);
cloud_mc.graphics.curveTo(70,30, 90,60);
cloud_mc.graphics.curveTo(130,50,140,70);
cloud_mc.graphics.curveTo(130,110,90,100);
cloud_mc.graphics.curveTo(60,110,40,100);
cloud_mc.graphics.curveTo(10,110,0,70);
cloud_mc.graphics.beginFill( 0x990000, 10 );

cloud_mc.x = stage.stageWidth*Math.random();
cloud_mc.y = 0.2*stage.stageHeight*Math.random();
//cloud_mc.rotation = Math.random() *360;
addChild(cloud_mc);
cloud_array.push(cloud_mc);

}

stage.addEventListener(Event.ENTER_FRAME, doCloud);

function doCloud(event:Event):void {
for (i = 0; i < 5; i++) {
var cloud_mc = cloud_array*;

	if (cloud_mc.alpha &lt; 0) {
		setCloud();
	}
	cloud_mc.x -= xspeed*Math.random();
}

}

I am able to use removeChild(…) for other movie clips that i have created that do not use eventListeners eg:

var circle:Sprite = new Sprite();
circle.graphics.beginFill(0xFFFFFF);
circle.graphics.drawCircle(0,0,40);
circle.graphics.endFill();
addChild(circle);
var myTween:Tween = new Tween(circle, “x”,Strong.easeOut,10,400,20,true);

var myTween2:Tween = new Tween(circle, “y”,Strong.easeOut,200,100,20,true);

Basically i want to get rid of those clouds when i enter a new scene! Be great if anyone could help!

Many Thanks

Tim