Warning: Cannot modify header information - h

Merci a johnjohn.
J'ai appliqué la recettesans succcès j'ai toujours le mêm message:

Warning: Cannot modify header information - headers already sent by (output started at C:\Documents and Settings\IFORMING.SVR001\Bureau\vtigerCRMPortable\App\vtigercrm\include\language\fr_fr.lang.php:1) in C:\Documents and Settings\IFORMING.SVR001\Bureau\vtigerCRMPortable\App\vtigercrm\modules\Users\Authenticate.php on line 131

Et donc une fois de plus je renvois un bout de code

ob_start(); ce que j'ai ajoouté sur vos conseils

/*********************************************************************************
* The contents of this file are subject to the SugarCRM Public License Version 1.1.2
* ("License"); You may not use this file except in compliance with the
* License. You may obtain a copy of the License at http://www.sugarcrm.com/SPL
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
* The Original Code is: SugarCRM Open Source
* The Initial Developer of the Original Code is SugarCRM, Inc.
* Portions created by SugarCRM are Copyright (C) SugarCRM, Inc.;
* All Rights Reserved.
* Contributor(s): ______________________________________.
********************************************************************************/
/*********************************************************************************
* $Header: /advent/projects/wesat/vtiger_crm/sugarcrm/modules/Users/Authenticate.php,v 1.10 2005/02/28 05:25:22 jack Exp $
* Description: TODO: To be written.
* Portions created by SugarCRM are Copyright (C) SugarCRM, Inc.
* All Rights Reserved.
* Contributor(s): ______________________________________..
********************************************************************************/

require_once('modules/Users/Users.php');
require_once('modules/Users/CreateUserPrivilegeFile.php');
require_once('include/logging.php');
require_once('user_privileges/audit_trail.php');

global $mod_strings;

$focus = new Users();

// Add in defensive code here.
$focus->column_fields["user_name"] = to_html($_REQUEST['user_name']);
$user_password = $_REQUEST['user_password'];

$focus->load_user($user_password);

if($focus->is_authenticated())
{

//Inserting entries for audit trail during login

if($audit_trail == 'true')
{
if($record == '')
$auditrecord = '';
else
$auditrecord = $record;

$date_var = $adb->formatDate(date('YmdHis'), true);
$query = "insert into vtiger_audit_trial values(?,?,?,?,?,?)";
$params = array($adb->getUniqueID('vtiger_audit_trial'), $focus->id, 'Users','Authenticate','',$date_var);
$adb->pquery($query, $params);
}

// Recording the login info
$usip=$_SERVER['REMOTE_ADDR'];
$intime=date("Y/m/d H:i:s");
require_once('modules/Users/LoginHistory.php');
$loghistory=new LoginHistory();
$Signin = $loghistory->user_login($focus->column_fields["user_name"],$usip,$intime);

//Security related entries start
require_once('include/utils/UserInfoUtil.php');

createUserPrivilegesfile($focus->id);

//Security related entries end
session_unregister('login_password');
session_unregister('login_error');
session_unregister('login_user_name');

$_SESSION['authenticated_user_id'] = $focus->id;
$_SESSION['app_unique_key'] = $application_unique_key;

// store the user's theme in the session
if (isset($_REQUEST['login_theme'])) {
$authenticated_user_theme = $_REQUEST['login_theme'];
}
elseif (isset($_REQUEST['ck_login_theme'])) {
$authenticated_user_theme = $_REQUEST['ck_login_theme'];
}
else {
$authenticated_user_theme = $default_theme;
}

// store the user's language in the session
if (isset($_REQUEST['login_language'])) {
$authenticated_user_language = $_REQUEST['login_language'];
}
elseif (isset($_REQUEST['ck_login_language'])) {
$authenticated_user_language = $_REQUEST['ck_login_language'];
}
else {
$authenticated_user_language = $default_language;
}

// If this is the default user and the default user theme is set to reset, reset it to the default theme value on each login
if($reset_theme_on_default_user && $focus->user_name == $default_user_name)
{
$authenticated_user_theme = $default_theme;
}
if(isset($reset_language_on_default_user) && $reset_language_on_default_user && $focus->user_name == $default_user_name)
{
$authenticated_user_language = $default_language;
}

$_SESSION['vtiger_authenticated_user_theme'] = $authenticated_user_theme;
$_SESSION['authenticated_user_language'] = $authenticated_user_language;

$log->debug("authenticated_user_theme is $authenticated_user_theme");
$log->debug("authenticated_user_language is $authenticated_user_language");
$log->debug("authenticated_user_id is ". $focus->id);
$log->debug("app_unique_key is $application_unique_key");

// Clear all uploaded import files for this user if it exists

global $import_dir;

$tmp_file_name = $import_dir. "IMPORT_".$focus->id;

if (file_exists($tmp_file_name))
{
unlink($tmp_file_name);
}
$arr = $_SESSION['lastpage'];
if(isset($_SESSION['lastpage']))
header("Location: index.php?".$arr[0])<<<< la pomme de discorde
else
header("Location: index.php");
}
else
{
$_SESSION['login_user_name'] = $focus->column_fields["user_name"];
$_SESSION['login_password'] = $user_password;
$_SESSION['login_error'] = $mod_strings['ERR_INVALID_PASSWORD'];

// go back to the login screen.
// create an error message for the user.
header("Location: index.php");
}

?>

Pour fare simple je ne sais vraiment lus quoi faire.
Help, SOS, mayday, secoro, au secours .

Merci d'avacne pour votre aide.

Meilleure salutations à tous
stratofigher sans bombe