Actionscript 3 :: Drag And Drop, Simple Example?

I want to implement drag&drop possibilities in my application. Here is my source code:I added images to the container, and now want to be able to move them from element PieceContainer to element board (defined in the another class). I tried to define mouse move handler as it was shown here: http[url].... but it doesn't do anything... Actually I don't understand how should I define drap initiator, and drop handler

public class PieceContainer extends Canvas
{
//private var image:Image = new Image();[code]..........

But actually have 2 problems:First: Items are draggable, but when i add them to board they stays on in the PiecesContainer.Second: I want items to be copied, rather then just moved (but when they are on board they should be movable, not copied)