Try this.

Code:
		yourClickTagInstanceName.addEventListener(MouseEvent.MOUSE_OVER, onMouseOver);
		yourClickTagInstanceName.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
		
		function onMouseOver(e:MouseEvent):void {
			movieClipBOX.gotoAndPlay('bannerStage2AnimIN'); 
		}
		
		function onMouseOut(e:MouseEvent):void {
			movieClipBOX.gotoAndPlay('bannerStage2AnimOUT); 
		}