Highlight target area when dragging objects on it

I did. The drag and drop works fine. Just don't know how to highlight the area.

Here is my code, mouseover and mouseout doesn't workout.

var root = this;
var pieces = root.pieces;
var slots = root.slots;
var restart = root.restart;


root.setup = function()
{
	createjs.Touch.enable(stage);
	stage.mouseMoveOutside = true;
	root.drawStart = stage.on("drawstart", root.start, null, true);
};

root.start = function(e)
{
	stage.off("drawstart", root.drawStart);
/*	winMessage.originalY = winMessage.y;
	*/
	pieces.on("mousedown", root.mouseDownHandler);	
};



root.mouseDownHandler = function(e)
{
	e.currentTarget.setChildIndex(e.target, e.currentTarget.children.length - 1);
	e.target.offsetX = (e.stageX / stage.scaleX) - e.target.x;
	e.target.offsetY = (e.stageY / stage.scaleY) - e.target.y;
	pieces.target = e.target;
	root.stageMouseMove = stage.on("stagemousemove", root.stageMouseMoveHandler);
	root.stageMouseUp = stage.on("stagemouseup", root.stageMouseUpHandler);
};

root.stageMouseMoveHandler = function(e)
{
	if (pieces.target)
	{
		pieces.target.x = (e.stageX / stage.scaleX) - pieces.target.offsetX;
		pieces.target.y = (e.stageY / stage.scaleY) - pieces.target.offsetY;
		
		var frequency = 15;
		stage.enableMouseOver(frequency);

		this.pieces.addEventListener("mouseover", fl_MouseOverHandler_9);
		this.pieces.addEventListener("mouseout", fl_MouseOutHandler_3);

	}	
};


function fl_MouseOverHandler_8()
{
	root.test.gotoAndPlay(1);
	console.log("In");
}




function fl_MouseOutHandler_3()
{
	root.test.gotoAndStop(0);
	console.log("Out");
}


root.stageMouseUpHandler = function(e)
{
	stage.off("stagemousemove", root.stageMouseMove);
	stage.off("stagemouseup", root.stageMouseUp);
	
	if (pieces.target)
	{
		root.check();
		pieces.target = null;
		
		
	}	
};



root.check = function()
{
	
	
	var spot = root.getObjectUnderPoint(pieces.target.x, pieces.target.y);
	
	if (!spot)
		return;
	
	root.slot = spot.parent.parent;

	console.log(spot);
	console.log(root.slot.name);
	
};


root.setup();