Reassign button listeners problem...

Question

I have a multilanguage site. I have a combo box that allows the user to change the language if the default system language isn't what they want to browse by. The site's button are added to the stage and then listeners are applies. When the language is changed, I'm removing the buttons and listeners and reassigning a new button to the old object and readding the listeners. However the listeners don't work, everything else is fine. I cannot figure out how to readd the listeners.
Here's my code:I'll only use one button to keep it simple
var products_btn;
// after the language is determine it adds the appropriate button from the library to the stage as the button object
products_btn = new EnProductsBTN();
  layer_3.addChild(products_btn);
  products_btn.name = "products_btn";
  products_btn.x = 255;
  products_btn.y = 544;
  products_btn.alpha = 0;
// then i add the listeners by calling the setUpButtons function
var mainButtons:Array = new Array();
mainButtons = [
      {label:products_btn, link:'/products/', cover:"quarter"}
function setUpButtons():void{
for(var i:Number = 0; i < mainButtons.length; i++){
  var thisMC:MovieClip = mainButtons[i].label as MovieClip;
  var thisLink:String = mainButtons[i].link;
  var thisCover:String = mainButtons[i].cover;
  thisMC.addEventListener(MouseEvent.MOUSE_OVER,btnOver);
  thisMC.addEventListener(MouseEvent.MOUSE_OUT,btnOut);
  thisMC.addEventListener(MouseEvent.CLICK,buttonPressed);
  thisMC.buttonMode = true;
  thisMC.deepLink = thisLink;
  thisMC.cover = thisCover;
// when the combo box is chaged to say spanish the buttons and listeners are removed in a function and then
// it adds the new button to the button object
products_btn = new EsProductsBTN();
  layer_3.addChild(products_btn);
  products_btn.name = "products_btn";
  products_btn.x = 255;
  products_btn.y = 544;
  products_btn.alpha = 0;
// that places the new button on stage just fine and then i call the setUpButtons function again and it doesn't work.
Why?

Answer 1

unless you're calling setUpButtons every time you create a new button, you should use:
var mainButtons:Array = new Array();
var products_btn;
// after the language is determine it adds the appropriate button from the library to the stage as the button object
products_btn = new EnProductsBTN();
  layer_3.addChild(products_btn);
  products_btn.name = "products_btn";
  products_btn.x = 255;
  products_btn.y = 544;
  products_btn.alpha = 0;
mainButtons.push({label:products_btn, link:'/products/', cover:"quarter"});
function setUpButtons():void{
for(var i:Number = 0; i < mainButtons.length; i++){
  var thisMC:MovieClip = mainButtons[i].label as MovieClip;
  var thisLink:String = mainButtons[i].link;
  var thisCover:String = mainButtons[i].cover;
  thisMC.addEventListener(MouseEvent.MOUSE_OVER,btnOver);
  thisMC.addEventListener(MouseEvent.MOUSE_OUT,btnOut);
  thisMC.addEventListener(MouseEvent.CLICK,buttonPressed);
  thisMC.buttonMode = true;
  thisMC.deepLink = thisLink;
  thisMC.cover = thisCover;
// when the combo box is chaged to say spanish the buttons and listeners are removed in a function and then
// it adds the new button to the button object
products_btn = new EsProductsBTN();
  layer_3.addChild(products_btn);
  products_btn.name = "products_btn";
  products_btn.x = 255;
  products_btn.y = 544;
  products_btn.alpha = 0;
// that places the new button on stage just fine and then i call the setUpButtons function again and it doesn't work.
Why?