[RESOLVED] 50%alpha, onRollOver+onRelease=100%alpha

[Playdoe]

I've been trying to code this so the thumbnails are at 50% alpha. Then when you rollover or click on the thumbnail they go to 100% alpha. The thumbnail that has been clicked on should stay at 100% to indicate that it is presently selected.

I've tried everything but can't seem to get it. What am I missing?

function callThumbs() {
	_root.createEmptyMovieClip("container_mc",_root.getNextHighestDepth());
	container_mc._x = _root.gallery_x;
	container_mc._y = _root.gallery_y;
	container_mc._alpha = 50;

preloader.onLoadComplete = function(target) {
			new Tween(target, "_alpha", Strong.easeOut, 0, 100, .5, true);
			target.my_txt.removeTextField();
			target.onRelease = function() {
				callFullImage(this._name);
			};

			target.onRollOver = function() {
				this._alpha = 200;
			};

			target.onRollOut = function() {
				this._alpha = 100;
			};

I've attached the .fla and thumbs to look at