Use length of XML file to tween movieclip?

Question

Hello,
I'm creating a horizontal scrolling gallery in which the content is loaded through xml. So far the xml loads fine and the content is easily nested within movieclips and positioned within a larger movieclip containing each of the movieclips containing the content. With that said, I am able to move this main movieclip left and right with no problem using a tween and a fixed position but I have no way of stopping the movieclip according to how much content is in the xml file. I'm attempting to use the length of the xml file to move this main movieclip but either it can't be done or my coding is wrong.
Thank you in advance!
Here is my code:
import fl.transitions.Tween;
import fl.transitions.easing.*;
import  fl.transitions.TweenEvent;
var currentContentIndex:uint = 0;
var  currentContent:MovieClip;
// container movieclip
var container:MovieClip = new  MovieClip();
container.y = 120;
addChild(container);
var imageLoader:Loader;
var xml:XML;
var xmlList:XMLList;
var xmlLoader:URLLoader =  new URLLoader();
xmlLoader.load(new URLRequest("gallery.xml"));
xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
var x_count:Number = 0;
var y_count:Number = 0;
// Everything in the function below loads and positions fine
function  xmlLoaded(event:Event):void
     xml = XML(event.target.data);
     xmlList  = xml.children();
     for(var i:int = 0; i < xmlList.length(); i++)
          //  contentContainer
          var contentContainer:MovieClip = new  MovieClip();
          contentContainer.graphics.beginFill(0xFFFFFF);
          contentContainer.graphics.drawRect(0,  0, 1000, 500);
          contentContainer.graphics.endFill();
          contentContainer.width  = 1000;
          contentContainer.height = 500;         
          contentContainer.x  = (contentContainer.width+400)*x_count;
          contentContainer.y  = 0;
          // thumbInfo
          var  imageInfo:MovieClip = new MovieClip();
          imageInfo.graphics.beginFill(0x000000);
          imageInfo.graphics.drawRect(0,  0, 150, 100);
          imageInfo.graphics.endFill();
          imageInfo.x  = 400;
          imageInfo.width = 150;
          imageInfo.height  = 100;
          addChild(imageInfo);
          imageLoader  = new Loader();
          imageLoader.load(new  URLRequest(xmlList[i].attribute("source")));
          x_count++;
          y_count = 0;
          contentContainer.addChild(imageLoader);
          contentContainer.addChild(imageInfo);
          container.addChild(contentContainer);
function tweenCurrentImageF(){
     currentContent=MovieClip(xmlList[currentContentIndex]);  // PROBLEM CODE?
     var targetX:Number = stage.stageWidth/2 -  currentContent.x - currentContent.width/2;
     var  myTween:Tween = new Tween(container, "x", Strong.easeInOut, container.x,  targetX, 1, true);
rightArrow.buttonMode = true;
rightArrow.addEventListener(MouseEvent.CLICK,  right);
function right(e:MouseEvent):void {
     currentContentIndex++;
     if(currentContentIndex<xmlList.length){
          tweenCurrentImageF();

Answer 1

Hey again,
I understand what you are saying and I've omitted that problem code because it's code I'm trying to carry over from a gallery using an array of movieclips and, to me, it seems irrelevant to this code. I have moved some code around and the movieclip scrolls now but its scrolling directly to the last nested movieclip even though the "currentContentIndex" variable traces 0.
I moved the button and it's function code inside of the xmlLoaded function because it was recognizing "contentContainer.x" as an undefined term when it was outside of it (I just stated this in case this is the problem).
Thank you again!
Here is my new code:
import fl.transitions.Tween;
import fl.transitions.easing.*;
import  fl.transitions.TweenEvent;
var currentContentIndex:uint = 0;
// container movieclip
var container:MovieClip = new  MovieClip();
container.y = 120;
addChild(container);
var imageLoader:Loader;
var xml:XML;
var xmlList:XMLList;
var xmlLoader:URLLoader =  new URLLoader();
xmlLoader.load(new URLRequest("gallery.xml"));
xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
var x_count:Number = 0;
var y_count:Number = 0;
function xmlLoaded(event:Event):void {
       xml = XML(event.target.data);
        xmlList  = xml.children();
        for(var i:int = 0; i < xmlList.length(); i++)
            //  contentContainer
            var contentContainer:MovieClip = new  MovieClip();
            contentContainer.graphics.beginFill(0xFFFFFF);
            contentContainer.graphics.drawRect(0,  0, 1000, 500);
            contentContainer.graphics.endFill();
            contentContainer.width  = 1000;
            contentContainer.height = 500;        
        contentContainer.x  = (contentContainer.width+400)*x_count;
        contentContainer.y  = 0;
          container.addChild(contentContainer);
            imageLoader  = new Loader();
         imageLoader.load(new  URLRequest(xmlList[i].attribute("source")));
          contentContainer.addChild(imageLoader);
            x_count++;
            y_count = 0;
          var imageText:TextField = new TextField();
          imageText.x = 400;
          imageText.y = 30;
          imageText.text = xmlList[i];
          imageText.autoSize = TextFieldAutoSize.LEFT;
          contentContainer.addChild(imageText);
     function tweenCurrentImageF(){
          var targetX:Number = stage.stageWidth/2 -  contentContainer.x - contentContainer.width/2;     
           var  myTween:Tween = new Tween(container, "x", Strong.easeInOut, container.x,  targetX, 2, true);
     rightArrow.buttonMode = true;
     rightArrow.addEventListener(MouseEvent.CLICK,  right);
     function right(e:MouseEvent):void {
          currentContentIndex++;
          if(currentContentIndex<xmlList.length()){
             tweenCurrentImageF();