How can I register users using my app?

Hello, I want to know what I'm doing wrong, im trying to connect my android app to openfire to create new users from my app, but when i run the my app it doesnt throws any error, but it dont create new users, i will post my code, please tellme what i'm doing wrong, or i need a special configuration of my openfire server?

public class CrearUsuarioNumero extends Activity {

private EditText usuario, pass;

public static final String HOST = "192.ip.ip.ip";

public static final int PORT = 5222;

public static final String SERVICE = "test"; <--- name of my server

XMPPConnection connection;

@Override

protected void onCreate(Bundle savedInstanceState) {

          // TODO Auto-generated method stub

          super.onCreate(savedInstanceState);

        setContentView(R.layout.numero);

        usuario = (EditText) findViewById (R.id.editText1);

        pass = (EditText) findViewById (R.id.editText2);

    }

public void crear_onClic(View v){

          create();

}

public void create(){

try{

    ConnectionConfiguration connConfig =

            new ConnectionConfiguration(HOST,PORT, SERVICE);

     connection = new XMPPConnection(connConfig);

try{

     connection.connect();

}

catch(XMPPException e){

    Toast.makeText(this, "connexion eror: "+e,3000).show();

}

try{

    AccountManager am = new AccountManager(connection);

Map<String, String> mp = new HashMap<String, String>();

String USERNAME=  usuario.getText().toString();

String PASSWORD =  pass.getText().toString();

mp.put("usuario", USERNAME);

mp.put("contraseña", PASSWORD);

am.createAccount(USERNAME, PASSWORD, mp);

}

catch(XMPPException e){

    Log.d("request!", "starting7 "+e);

    Toast.makeText(this, "Adding account Error: "+e,3000).show();

}

connection.disconnect();

}

catch (Exception e) {

}

}

}

my log is the picture