Attach premade button to every image loaded from xml?

I am trying to add a button to every image loaded from an xml file, so that when the image is rolled over the button does something on top of it.

I have made the button and given it the linkage id of thumbOver.

[AS]
function loadXML(loaded) {
if (loaded) {
xmlNode = this.firstChild;
thumbs = [];
total = xmlNode.childNodes.length;
for (i=0; i<total; i++) {
thumbs* = xmlNode.childNodes*.childNodes[4].firstChild.nodeValue;
thumbnailer(i);
}
} else {
content = “file not loaded!”;
}
}
xmlData = new XML();
xmlData.ignoreWhite = true;
xmlData.onLoad = loadXML;
xmlData.load(“testing.xml”);

function thumbnailer(k) {
var newthumb:MovieClip = thumbnail_mc.createEmptyMovieClip(“t”+k,thumbnail_mc.getNextHighestDepth());
var thumboverC:MovieClip = newthumb.createEmptyMovieClip(“thethumbover”,newthumb.getNextHighestDepth())
thumboverC.attachMovie(“thumbOver”,“mythumbover”,thumboverC.getNextHighestDepth())

tlistener = new Object();
tlistener.onLoadInit = function(target_mc) {
    target_mc._x = hit_left._x+(target_mc._width+5)*k;

};
image_mcl = new MovieClipLoader();
image_mcl.addListener(tlistener);
image_mcl.loadClip(thumbs[k], "thumbnail_mc.t"+k);

}[/AS]
The thumbnails come up fine, but the button doesnt make a showing and i cannot see why not. Can anyone tell me why it isnt showing up?