Problem with function appel in controler

[eluser]Unknown[/eluser]
Hello,

I have a error, and i don't find any solution (i'm newbies).
this is the code of my controler :

Code:

<?php
class Messages extends Controller {
  function Messages(){
    parent::Controller();
    $this->load->helper('url');
    $this->load->helper('form');
    $this->load->helper('html');
    $this->load->model('Messages_model','message', true);
    $this->output->enable_profiler(true);
  }
  
  ... some code

  function valid_add(){ #validation du formulaire de saisie
    if ($_POST['site_id']!=0): //Si on écrit un message depuis la liste des sites    
         $this->message->insert($_POST['site_id']); <-- WORKS
        redirect('sites');
    else: //on viens de la gestion des messages, on ecrit un msg a tous lessites existants
        $sites = $this->db->get('sites');
        foreach($sites->result() as $site):
            $this->message->insert($_POST['site_id']); <-- ERROR
        endforeach;
        //redirect('messages');
    endif;
  }

  ... some code

}

?&gt;

my controler look like :

Code:

<?php
class Messages_model extends Model {

    function Messages_model(){
        parent::Model();
        $this->load->helper('date');
    }
    
    function insert($id){
        $datestring = "%Y-%m-%d %h:%i:%s";
        $this->date = mdate($datestring, time());
        $this->titre   = $_POST['titre'];
        $this->message   = $_POST['texte'];
        $this->site_id   = $id;
        $this->db->insert('messages', $this);
    }

  some code ...

}
?>

with this code, i have the folowing error :

Code:

Fatal error: Call to a member function insert() on a non-object in C:\wamp\www\SITE\system\application\controllers\messages.php on line 43

if i don't use foreach in my function it works.

Where is the error (don't say : a line 43 :lol: )

thank's, sorry for my english, i'm french.