Android APK not working

Hi, i have a very very very weird problem. When i connect my android phone to my Mac, and deploy the app i'm building, directly, it works... but i i install the APK in the folder: projectname/build/android/bin, it does not work, at all. The App just does nothing then trying to establish a request to my server, but that only happens when i used the APK, why? i have several days with this problem and i'm just giving up. this is the code, thanks a lot.:

var xhr = Ti.Network.createHTTPClient();
        var data =
        {
            "user": $.emailTf.getValue(),
            "password": $.passTf.getValue(),
            "genre": $.sexPicker.getSelectedRow(0).title,
        };
    data = JSON.stringify(data);
        //On Load
        xhr.onload = function(e){
            var response = JSON.parse(this.responseText);
                };
        xhr.onerror = function(e){
        };
        xhr.open("POST", "url");
        xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8");
        xhr.send(data);

Titanium Studio, build: 3.4.1.201410281727
(c) Copyright 2012-2014 by Appcelerator, Inc.  All rights reserved.
 
Build: jenkins-titanium-rcp-master-202 (origin/master)
Date: 28 October 2014, 17:28:23
 
Titanium SDK: 3.5.1 GA.
OS X Yosemite version 10.10.2