AS3 startDrag x y coordinates

[bluebatray]

Hey guys, not sure if this is possible but i'd like to get the X,Y coordinates of a button I drag. here's my problem:

backbutton_btn.addEventListener(MouseEvent.MouseDown, backbuttonDown);
backbutton_btn.addEventListener(MouseEvent.MouseMove, backbuttonMove);

public function backbuttonDown(e:MouseEvent)
        {
            backbutton_btn.startDrag();
        }

public function backbuttonMove(e:MouseEvent)
        {
            trace(backbutton_btn.x +","+backbutton_btn.y);
} 

the x and y coordinates remain the same even though i'm clearly dragging my button all over the stage. I did code my own by putting events and whatnot around the button but startDrag seemed smoother and faster. is it even possible?