Drag and Drop (simple)

Hi guys

I'm trying to make a simple drag and drop game.  I've named the movie   clip in the properties window as "eye" and have written the following   code in the frame.

I can pick up the movie clip, but not put it down.  Can someone please help me?

I've attached the file: http://www.flashadvisor.com/forum/attachment.php?attachmentid=255&d=1285202999

Any help you can give to help me solve this will be much appreciated by me and a couple of hundred students i teach

Thanks

m

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AS3
eye.addEventListener(MouseEvent.MOUSE_DOWN, pick_up);
eye.addEventListener(MouseEvent.MOUSE_UP, put_down);



function pick_up(event:MouseEvent): void {
trace("pick up ");
event.target.startDrag(true);


}

function put_down (event:MouseEvent): void {
trace("downdowndowndown");
event.target.stopDrag();

}

eye.buttonMode = true;

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