FLASH 8 ช่วยหน่อยครับ ดัดแปลงโค้ด hover caption แล้วมีปัญหา

button1.onRollOver = function() {
	captionFN(true,ground_beef,this);
//ground_beef คือชื่อรูปภาพ
	this.onRollOut = function() {
		captionFN(false);
	};
};
button2.onRollOver = function() {
	captionFN(true,cubed_steak,this);
//cubed_steak คือชื่อรูปภาพ
	this.onRollOut = function() {
		captionFN(false);
	};
};

captionFN = function (showCaption, captionText, bName) {
	if (showCaption == true) {
		_root.createEmptyMovieClip("hoverCaption", this.getNextHighestDepth());
		captionText._width = 7*captionText.desc.text.length;
		//
		if ((bName._width+bName._x+captionText._width)>Stage.width) {
			xo = -2-captionText._width;
			yo = -17;
		} 
		else {
			xo = 2;
			yo = -17;
		}
		hoverCaption.onEnterFrame = function() {
			captionText._x = _root._xmouse+xo;
			captionText._y = _root._ymouse+yo;
			captionText._visible = true;
		};
	} 
	
	else{
		delete hoverCaption.onEnterFrame;
		captionText._visible = false;
	}
};