Flash cannot setup XMLSocket - actionscript-3

Question

I just started a project in flash, but it can't startup XMLSocket.
My code:
import Network.CommunicationBootstrap;
var network:CommunicationBootstrap = new CommunicationBootstrap();
network.start("127.0.0.1", 30000);
Package Network classs CommunicationBootstrap:
package Network {
import flash.net.XMLSocket;
import flash.events.IOErrorEvent;
import flash.events.SecurityErrorEvent;
public class CommunicationBootstrap {
private var socket:XMLSocket = new XMLSocket();
public function CommunicationBootstrap() {
socket.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
}
public function start(ip:String, port:int):void {
this.socket.connect(ip, port);
trace("Testing this out!");
}
private function ioErrorHandler(event:IOErrorEvent):void {
trace("ioErrorHandler: " + event);
}
private function securityErrorHandler(event:SecurityErrorEvent):void {
trace("securityErrorHandler: " + event);
}
}
}
What my errors are:
ioErrorHandler: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2031: Socket Error. URL: 127.0.0.1"]
securityErrorHandler: [SecurityErrorEvent type="securityError" bubbles=false cancelable=false eventPhase=2 text="Error #2048: Security sandbox violation: file:///C|/Users/iufrs/Documents/AS3/1/Torn.swf cannot load data from 127.0.0.1:30000."]
(gotten by trace and the 2 events)

Answer 1

This is (as the message hints) due to the sandbox your swf is running in.
from the docs
Local file describes any file that is referenced by using the file:
protocol
Which is what you are doing here.
Further:
The local-with-filesystem sandbox—For security purposes, Flash Player
places all local SWF files and assets in the local-with-file-system
sandbox, by default. From this sandbox, SWF files can read local files
(by using the URLLoader class, for example), but they cannot
communicate with the network in any way. This assures the user that
local data cannot be leaked out to the network or otherwise
inappropriately shared
This is what is causing you to see the error.
If you intend your swf to be hosted by a web server, then you should make sure the swf can be loaded from your webserver running on 127.0.0.1, and you should load it over http, e.g. as http://127.0.0.1/YourSwf.swf
If you want to run your sef from the filesystem, you need to compile it to run in the 'local-with-networking' sandbox, the link explains how.
.