How can I move two figures on the stage with remote shared object?

Hi, I have a problem...

I need to move two figures on the stage with shared object like the "Tutorial shared Object ball" on the adobe website but with more than one figure. All the client must see the figures moving. The figure are a circle (Cerchio) and a square (Quadrato).

Help me, please. This is the script:

package
{
  import flash.display.Sprite;
  import flash.net.SharedObject;
  import flash.events.NetStatusEvent;
  import flash.events.SyncEvent;
  import flash.net.NetConnection;
  import flash.events.MouseEvent;
  import flash.display.MovieClip
  //import flash.net.ObjectEncoding;

  public class BlocchiLogici extends Sprite
  {
        private var pointer_so:SharedObject;
        private var pointer1_so:SharedObject;
        private var nc:NetConnection;
        private var good:Boolean;
        private var Cerchio:cerchio;
        private var Quadrato:quadrato;
        private var Rettangolo:rettangolo;
        private var Triangolo:triangolo;

        public function BlocchiLogici()
        {
             //NetConnection.defaultObjectEncoding=flash.net.ObjectEncoding.AMF0;
             //Connect
             var rtmpNow:String="rtmp://192.168.1.66/BlocchiLogici";
             nc=new NetConnection  ;
             nc.connect (rtmpNow);
             nc.addEventListener (NetStatusEvent.NET_STATUS,doSO);
             Cerchio=new cerchio ;
             addChild (Cerchio);
             Cerchio.x=50;
             Cerchio.y=200;
             Cerchio.addEventListener (MouseEvent.MOUSE_DOWN,beginDrag);
             Cerchio.addEventListener (MouseEvent.MOUSE_UP,endDrag);
             Quadrato=new quadrato ;
             addChild (Quadrato);
             Quadrato.x=100;
             Quadrato.y=200;
             Quadrato.addEventListener (MouseEvent.MOUSE_DOWN,beginDrag);
             Quadrato.addEventListener (MouseEvent.MOUSE_UP,endDrag);
        }

        private function doSO (e:NetStatusEvent):void
        {
             good=e.info.code == "NetConnection.Connect.Success";
             if (good)
             {
                   //Shared object
                   pointer_so=SharedObject.getRemote("point",nc.uri,false);
                   pointer_so.connect (nc);
                   pointer_so.addEventListener (SyncEvent.SYNC,doUpdate);
             }
        }

        private function doUpdate (se:SyncEvent):void
        {   
             for (var cl:uint; cl < se.changeList.length; cl++)
                 {
                   trace(se.changeList[cl].code);
                   if (se.changeList[cl].code == "change")
                   {   
                       if (Cerchio)
                    {
                        switch (se.changeList[cl].name)
                        {
                             case "xpos" :
                                   Cerchio.x=pointer_so.data.xpos;
                                   break;
                             case "ypos" :
                                   Cerchio.y=pointer_so.data.ypos;
                                   break;
                        }
                    }
                    else if (Quadrato)
                       {
                           switch (se.changeList[cl].name)
                        {                   
                             case "xpos" :
                                   Quadrato.x=pointer_so.data.xpos;
                                   break;
                             case "ypos" :
                                   Quadrato.y=pointer_so.data.ypos;
                                   break;
                        }
                    }
                 }
             }
        }

        private function beginDrag (e:MouseEvent)
        {
            if (Cerchio)
             {
                 Cerchio.addEventListener (MouseEvent.MOUSE_MOVE,moveMc);
                 Cerchio.startDrag ();
             }
            else if (Quadrato)
             {
                 Quadrato.addEventListener (MouseEvent.MOUSE_MOVE,moveMc);
                 Quadrato.startDrag ();
             }
        }

        private function endDrag (e:MouseEvent)
        {
            if (Cerchio)
             {
                 Cerchio.stopDrag ();
             }
            else if (Quadrato)
             {
                 Quadrato.stopDrag ();
             }
        }

        private function moveMc (e:MouseEvent)
        {
            e.updateAfterEvent ();
            if (Cerchio)
             {
                 pointer_so.setProperty ("xpos",Cerchio.x);
                 pointer_so.setProperty ("ypos",Cerchio.y);
             }
            else if (Quadrato)
             {
                 pointer_so.setProperty ("xpos",Quadrato.x);
                 pointer_so.setProperty ("ypos",Quadrato.y);
             }
        }
  }
}

I need of a server side file?

Thanks.