Socket connection Security sandbox violation issue

I am trying to create an desktop application, to connect FTP server using Socket connection and transfer data / assets between server and client.

For that I am using following flow:

var commandSocket:Socket = new Socket();

                              commandSocket.addEventListener(ProgressEvent.SOCKET_DATA, onSocketData);

                              commandSocket.addEventListener(Event.CONNECT, onSocketConnect);

                              commandSocket.addEventListener(IOErrorEvent.IO_ERROR, function(e:IOErrorEvent):void

                              {

        Console.error("Command socket error: " + e.toString()); 

                              });

                              commandSocket.addEventListener(SecurityErrorEvent.SECURITY_ERROR,   function(e:SecurityErrorEvent):void

                              {

           Console.error("Command socket error: " + e.toString());

  });

                              commandSocket.addEventListener(Event.CLOSE, function(e:Event):void

                              {

                                             Console.progress("Command socket closed");

  });

Security.loadPolicyFile("xmlsocket://xx.xx.xx.xx:1080");

                              commandSocket.connect(xx.xx.xx.xx, 1080);

Befor connecting to server sending an request to load Socket policy file. For that I have set an crossdomain.xml file in the FTP folder on server. For more detail refer the refer the crossdoamin below:

<?xml version="1.0"?>

<!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd">

<cross-domain-policy>

   <site-control permitted-cross-domain-policies="all"/>

   <allow-access-from domain="*" to-ports="1080" /> 

</cross-domain-policy>

I am sending USER, PASS etc commands to server and its responds fine. But when I try to upload any assets then its give me the error:

Error #2044: Unhandled securityError:. text=Error #2048: Security sandbox violation: app:/Test.swf cannot load data from xx.xx.xx.xx:30072.

Thanks