Problem with Arduino + Flash

i'm working on project allow me click button on flash activate led on hardware.

problem: when enter specific frame button located on flash, communication started successfully. however, when went other frame , decided come button frame, there error. serproxy display error message of "failed open comm port - connection refused" . , communication ended.

i'm pretty sure there no problem either arduino coding or serproxy.
is there anyway can enter other frame , come button frame without having communication disconnected?

below coding of flash actionscript 2.

code: [select]

//------------------------------------------------------------------------ basic arduino

import arduino;

var port:number = 5331;// socket port configured use?
// see net_port entries serproxy.cfg

// create custom object flash's xmlsocket
var a:arduino = new arduino(port);


//------------------------------------------------------------------------ listeners


// can trigger custom actions adding listners arduino object. example, can setup your
// actionscript code run setup function when flash connects socket listener

alistener = new object();

alistener.onconnect = function() {
     setupboard();
};

// binds custom listeners arduino object (a)
a.addeventlistener("onconnect",alistener);
a.addeventlistener("onreceivedata",alistener);
//------------------------------------------------------------------------ that's all!

function setupboard() {
     trace("connection established. setting leds...");


     
     // each physical led gets virtual copy in flash
      (var i=2;i<=4;i++) {
           
           // associates pin each movieclip
           var mc:movieclip = _root.infos["link"+i];
           mc.pin = i.tostring();
           
           var owner = this;
           mc.onpress = function() {
                 owner.a.send(this.pin);
                 for (var i=2; i<=4; i++) {
                  _root.infos["link"+i].gotoandstop(1);
           }
                 
           _root.infos["link"+this.pin].gotoandplay(2);
                 
           }
           

     }
     
}


please me problem. kind of urgent.
thank you.

please.. anyone..  :-/

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