Why does my label not move until after I drag it when I call it to after my mouse wheel event?

Question

public void mouseWheelMoved(MouseWheelEvent arg0)
{
    if(dragging)
    {
        drag.rotate();
        drag.setLocation(getMousePosition());
        getContentPane().repaint();

    }


}

drag is the label I'm dragging and it doesn't set the location to the mouse position until after I drag it again.