[FormHelper] BlackHole de type auth.

Bonjour,
Je suis en train de développer un site web et son panel admin. J'utilise donc le FormHelper de CakePHP mais une erreur parvient a la soumission : "The request has been black-holed" Et je sais que c'est de type auth grâce à la fonction
public function blackhole($type).

admin_view.ctp :

<div class="row-fluid">
            <!-- Forms: Box -->
            <div class="span12">
                <!-- Forms: Top Bar -->
                <div class="top-bar">
                    <h3><i class="icon-cog"></i> Modification d'une nouveautée</h3>
                </div>
                <!-- / Forms: Top Bar -->
                <!-- Forms: Content -->
                <div class="well no-padding">
                    <!-- Forms: Form -->
                    <?php 
                    echo $this->Form->create('News', array(
                        'class' => 'form-horizontal'
                    )); 
                    ?>
                        <div class="control-group">
                            <label class="control-label">ID</label>
                            <div class="controls">
                                <input class="span6 m-wrap" type="text" placeholder="<?= $id ?>" disabled="">
                                <span class="help-inline">Vous ne pouvez pas changé l'id de la nouveautée</span>
                            </div>
                        </div>

                        <div class="control-group">
                            <label class="control-label">Titre</label>
                            <div class="controls">
                                <?php 
                                    $this->Form->unlockField('News.content');
                                    echo $this->Form->input('', array(
                                        'type' => 'text',
                                        'name' => 'title',
                                        'class' => 'span6 m-wrap',
                                        'value' => $title,
                                        'placeholder' => 'Titre'
                                    ));
                                ?>
                            </div>
                        </div>
                        <div class="control-group">
                            <label class="control-label">Auteur</label>
                            <div class="controls">
                                <input class="span6 m-wrap" type="text" placeholder="<?= $author ?>" disabled="">
                                <span class="help-inline">Celui qui a publié la nouveautée</span>
                            </div>
                        </div>
                        <div class="control-group">
                        <?= $this->Html->script('tinymce/tinymce.min.js') ?>
                        <script type="text/javascript">
                        tinymce.init({
                            selector: "textarea",
                            height : 300,
                            width : '100%',
                            language : 'fr_FR'
                         });
                        </script>
                        <?php
                        $this->Form->unlockField('News.content');
                        echo $this->Form->textarea('News.content', array('value' => $content));
                        ?>
                        </div>
                        <div class="form-actions">
                            <?php
                            echo $this->Form->button('Envoyer', array(
                                'type' => 'submit',
                                'class' => 'btn btn-primary'
                            ));
                            ?>
                            <a href="../../" class="btn">Annuler</a>  
                        </div>
                    <?php echo $this->Form->end(); ?>
                    <!-- / Forms: Form -->           
                </div>
                <!-- / Forms: Content -->
            </div>
            <!-- / Forms: Box -->
        </div>

NewsController.php (Fonction admin_view):

public $components = array('Security');
    public function beforeFilter() {
        $this->Security->blackHoleCallback = 'blackhole';
    }
    public function blackhole($type) {
        echo '<h3><center>Un probl&egraveme est survenu ! Type : '.$type.'</center></h3>';
        $this->layout = null;
    }
    public function admin_view($id = false) {
            if(!$id) {
                $this->redirect('../news');
            }
            // Thème
            $this->layout = "admin";
            // Variable d'infos
            $this->loadModel('User');
            $search_members = $this->User->find('all'); $this->set(compact('search_members'));
            $count_members = $this->User->find('count'); $this->set(compact('count_members'));
            $this->loadModel('Visit');
            $count_visits = $this->Visit->find('count'); $this->set(compact('count_visits'));
            $this->loadModel('News');
            $count_news = $this->News->find('count'); $this->set(compact('count_news'));
            $this->loadModel('Comment');
            $count_comments = $this->Comment->find('count'); $this->set(compact('count_comments'));
            $title_for_layout = "Modification d'une news"; $this->set(compact('title_for_layout'));
            $view_news = $this->News->find('all', array(
                'conditions' => 'id='.$id
            ));
            if(!$view_news) {
                $this->redirect('../news');
            }
            $id = $view_news'0']'News']'id']; $this->set(compact('id'));
            $title = $view_news'0']'News']'title']; $this->set(compact('title'));
            $content = $view_news'0']'News']'content']; $this->set(compact('content'));
            $created = $view_news'0']'News']'created']; $this->set(compact('created'));
            $author = $view_news'0']'News']'author']; $this->set(compact('author'));
            $like = $view_news'0']'News']'like']; $this->set(compact('like'));

    }

Comment faire ?

Merci d'avance,
Cordialement,
Eywek.