Problem with onRelease

1

Hi!
I’m trying to use onRelease for some dynamically created movieclips (thumbnails) so that when they are clicked, they can display an image. Here’s my code:

var myLoadvariable:LoadVars = new LoadVars();
myLoadvariable.load(“http://www.flossline.com/vera/imagesload.php”);

myLoadvariable.onLoad = function(success) {
if (success) {

  _global.imageArray = new Array;
  
  imageArray =  myLoadvariable.files.split("|");
  
  for(i=0;i<imageArray.length;i++){
	  	
      _root.createEmptyMovieClip("thumbHolder"+i, 200+i);
      loadMovie("myURL"+imageArray*, "thumbHolder"+i);				
}//end for

}

If I then try:

thumbHolder1.onRelease=function(){
//code
}

the movieclips (thumbnails) do not become clickable.

I think it might be that dynamically created movieclips cannot access their events…but is there another way to do this?