[問題] new movieclip

小弟剛學AS沒多久，想問各位大大，我永遠只能控制第一個複制出來的物件 後面都沒辦法控制，我該怎麼做? 我不只要移動我還要可以放大縮小! 該怎麼做?
var mymovie :movieclip; new_btn.addEventListener(MouseEvent.CLICK,newmovie);
function newmovie (e:MouseEvent):void
{  
mymovie = new movieclip();   
mymovie .x = 100;   
mymovie .y = 100;  
mymovie .height =200 ;
mymovie .width =200;
mymovie.addEventListener(MouseEvent.MOUSE_DOWN,moviestar);
mymovie.addEventListener(MouseEvent.MOUSE_UP,moviestop);
addChild( mymovie );
}
function moviestar(e:MouseEvent):void
{
mymovie.startDrag();
}
function moviestop(e:MouseEvent):void
{
mymovie.stopDrag();
}