Log in/out error when change domain

[gcltlee]

Hi I changed my domain to another site in the local config file, just changed

define('SITE_URL', 'http://airchinavirtual.net');

the early url is hainan-va.org

then got those error when log in

Warning: Cannot modify header information - headers already sent by (output started at /home/hainanva/public_html/core/app.config.php:1) in /home/hainanva/public_html/core/modules/Login/Login.php on line 143
Warning: Cannot modify header information - headers already sent by (output started at /home/hainanva/public_html/core/app.config.php:1) in /home/hainanva/public_html/core/modules/Login/Login.php on line 153

error when log out

Warning: Cannot modify header information - headers already sent by (output started at /home/hainanva/public_html/core/app.config.php:1) in /home/hainanva/public_html/core/common/Auth.class.php on line 341

I searched the forum I see the solution is delete any space or character before or after the php tag, I checked both config php file but there is no space or character before or after the php tag

here is the login.php code :

<?php
/**
* phpVMS - Virtual Airline Administration Software
* Copyright (c) 2008 Nabeel Shahzad
* For more information, visit www.phpvms.net
* Forums: http://www.phpvms.net/forum
* Documentation: http://www.phpvms.net/docs
*
* phpVMS is licenced under the following license:
* Creative Commons Attribution Non-commercial Share Alike (by-nc-sa)
* View license.txt in the root, or visit http://creativecommons.org/licenses/by-nc-sa/3.0/
*
* @author Nabeel Shahzad
* @copyright Copyright (c) 2008, Nabeel Shahzad
* @link http://www.phpvms.net
*/

class Login extends CodonModule
{
public function __construct()
{
parent::__construct();
}

public function index()
{
$this->login();
}

public function login($redir='')
{
if(Auth::LoggedIn() == true)
{
$this->render('login_already.tpl');
return;
}

$this->set('redir', $redir);

if(isset($this->post->action) && $this->post->action == 'login')
{
$this->ProcessLogin();
}
else
{
$this->render('login_form.tpl');
}
}

public function logout()
{
Auth::LogOut();
$this->set('redir', SITE_URL);
$this->render('login_complete.tpl');
}

public function forgotpassword()
{
if($this->post->action == 'resetpass')
{
$this->ResetPassword();
return;
}

$this->render('login_forgotpassword.tpl');
}

public function ResetPassword()
{
$email = $this->post->email;

if(!$email)
{
return false;
}
else
{
$pilotdata = PilotData::GetPilotByEmail($email);

if(!$pilotdata)
{
$this->render('login_notfound.tpl');
return;
}

$newpw = substr(md5(date('mdYhs')), 0, 6);

RegistrationData::ChangePassword($pilotdata->pilotid, $newpw);

$this->set('firstname', $pilotdata->firstname);
$this->set('lastname', $pilotdata->lastname);
$this->set('newpw', $newpw);

$message = Template::GetTemplate('email_lostpassword.tpl', true);

Util::SendEmail($pilotdata->email, 'Password Reset', $message);

$this->render('login_passwordreset.tpl');
}
}

public function ProcessLogin()
{
$email = $this->post->email;
$password = $this->post->password;

if($email == '' || $password == '')
{
$this->set('message', 'You must fill out both your username and password');
$this->render('login_form.tpl');
return false;
}
if(!Auth::ProcessLogin($email, $password))
{
$this->set('message', Auth::$error_message);
$this->render('login_form.tpl');
return false;
}
else
{
if(Auth::$userinfo->confirmed == PILOT_PENDING)
{
$this->render('login_unconfirmed.tpl');
Auth::LogOut();

// show error
}
elseif(Auth::$userinfo->confirmed == PILOT_REJECTED)
{
$this->render('login_rejected.tpl');
Auth::LogOut();
}
else
{
$pilotid = Auth::$userinfo->pilotid;
$session_id = Auth::$session_id;

# If they choose to be "remembered", then assign a cookie
if($this->post->remember == 'on')
{
 $cookie = "{$session_id}|{$pilotid}|{$_SERVER['REMOTE_ADDR']}";
 $res = setrawcookie(VMS_AUTH_COOKIE, $cookie, time() + Config::Get('SESSION_LOGIN_TIME'), '/');
}
PilotData::UpdateLogin($pilotid);

#$this->set('redir', SITE_URL . '/' . $this->post->redir);
#$this->render('login_complete.tpl');

CodonEvent::Dispatch('login_success', 'Login');

$this->post->redir = str_replace('index.php/', '', $this->post->redir);
header('Location: '.url('/'.$this->post->redir));
}

return;
}
}
}

Any one know what's happening ?