Timer issues

I'm still trying to wrap my head around AS3 and timers.  What I'm trying to do is have an image fade in, pause for 6 seconds and then fade out.  My 6 seconds is doing something, but it's not what I want it to do and I'm not sure why.  If anyone knows of a really good timer tutorial dealing with images, I'd appreciate it.

Here's my code:

import fl.transitions.Tween;
import fl.transitions.easing.*;
import fl.transitions.TweenEvent;
var myTween:Tween;

var xmlRequest:URLRequest = new URLRequest("imageData.xml");
var xmlLoader:URLLoader = new URLLoader(xmlRequest);
var imgData:XML;
var imageLoader:Loader;
var rawImage:String;
var rawH:String;
var rawW:String;

var imgNum:Number = 0;
var checkSec:Timer = new Timer(100);
var delay:Timer = new Timer(6000);
var numberOfChildren:Number;

xmlLoader.addEventListener(Event.COMPLETE, xmlLoadedF);

function xmlLoadedF(event:Event):void {
    checkSec.start();
    checkSec.addEventListener(TimerEvent.TIMER, checkerF);
    imgData = new XML(event.target.data);
}

function packagedF():void{
    checkSec.removeEventListener(TimerEvent.TIMER, checkerF);
    rawImage = imgData.image[imgNum].imgURL;
    numberOfChildren = imgData.*.length();
    rawW = imgData.image[imgNum].imgW;
    rawH = imgData.image[imgNum].imgH;
    imageLoader = new Loader;
    imageLoader.load(new URLRequest(rawImage));
    master_mc.addChild(imageLoader);
    imageLoader.x = (stage.stageWidth - Number(rawW)) / 2;
    imageLoader.y = (stage.stageHeight - Number(rawH)) / 2;
    imageLoader.alpha = 0;
    myTween = new Tween(imageLoader,"alpha", Regular.easeOut, imageLoader.alpha, 1, 3, true);
    delay.start();
    delay.addEventListener(TimerEvent.TIMER, nextImgF);
    myTween.addEventListener(TweenEvent.MOTION_FINISH, fadeOut);
   
}

function checkerF(event:TimerEvent):void{
    if(imgNum == 0){
        packagedF();
    }else if(imgNum < numberOfChildren){
        imageLoader.unload();
        packagedF();
    }else{
        imageLoader.unload();
        imgNum = 0;
        packagedF();
    }
}

function nextImgF(event:TimerEvent): void {
    checkSec.addEventListener(TimerEvent.TIMER, checkerF);
    imgNum++;
}

function fadeOut(e:Event):void{
    imageLoader.alpha = 1;
    myTween = new Tween(imageLoader,"alpha", Strong.easeOut, imageLoader.alpha, 0, 3, true);
}