Audio upload not working on server - actionscript-3

Question

I have an app which records and upload mic input encoding in mp3.
When I test locally, in Flash IDE, it works fine, my audio file is uploaded.
What I have tried:
All my files are on swf_dir (see in the code below)
My embed tag already have allowScriptAcess set to always;
Already put a generic crossdomain.xml in my host root and in swf_dir;
My main class already load a policy file and allow all domains (even this being unnecessary, because it's in the same server): system.security.loadPolicyFile("http://www.host.com/swf_dir/crossdomain.xml") and system.Security.allowDomain("*")
Here is the upload/encode class.
package
{
import flash.events.ErrorEvent;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.HTTPStatusEvent;
import flash.events.IOErrorEvent;
import flash.events.ProgressEvent;
import flash.events.SecurityErrorEvent;
import flash.net.URLLoader;
import flash.net.URLLoaderDataFormat;
import flash.net.URLRequest;
import flash.net.URLRequestHeader;
import flash.net.URLRequestMethod;
import flash.utils.ByteArray;
import org.bytearray.micrecorder.encoder.WaveEncoder;
import fr.kikko.lab.ShineMP3Encoder;
/**
* ...
* #author Marcelo de Assis
*/
public class Mp3Helper extends EventDispatcher
{
var loader:URLLoader = new URLLoader();
var LOCAL_PATH:String = "http://www.host.com/swf_dir/upload.php"; // URL used to test on Flash IDE
var PRODUCTION_PATH:String = "upload.php"; // URL used to test on server
var mp3Encoder:ShineMP3Encoder;
var urlRequest:URLRequest = new URLRequest();
var urlLoader:URLLoader = new URLLoader();
public function Mp3Helper()
{
urlRequest.url = PRODUCTION_PATH;
urlRequest.contentType = 'multipart/form-data; boundary=' + UploadPostHelper.getBoundary();
urlRequest.method = URLRequestMethod.POST;
urlRequest.requestHeaders.push( new URLRequestHeader( 'Cache-Control', 'no-cache' ) );
var urlLoader:URLLoader = new URLLoader();
urlLoader.dataFormat = URLLoaderDataFormat.BINARY;
}
function upload_s(soundByteArray: ByteArray)
{
var waveEncoder:WaveEncoder = new WaveEncoder();
var wavData:ByteArray = waveEncoder.encode(soundByteArray, 1);
mp3Encoder = new ShineMP3Encoder(wavData);
mp3Encoder.addEventListener(Event.COMPLETE, mp3EncodeComplete);
mp3Encoder.start();
}
function mp3EncodeComplete(event: Event) : void
{
urlRequest.data = UploadPostHelper.getPostData("audio.mp3", mp3Encoder.mp3Data);
urlLoader.load(urlRequest);
urlLoader.addEventListener(Event.COMPLETE, loaderCompleted);
}
private function loaderCompleted(event: Event):void
{
dispatchEvent(event);
var fileLoader: URLLoader = URLLoader(event.target);
trace("loaderCompleted: ", fileLoader.data);
}
}
}

Answer 1

In case of URLLoader security error try to turn on policy logging (PolicyFileLog = 1) in mm.cfg file (check out this article where to locate mm.cfg file in your OS http://jpauclair.net/2010/02/10/mmcfg-treasure/, for win7 the default log location is C:\Users\user\AppData\Roaming\Macromedia\Flash Player\Logs\policyfiles.txt), it will helps in case of Socket as well.