Missing Controller

Error: Atelierb1Controller could not be found.

Error: Create the class Atelierb1Controller below in file: app/controllers/atelierb1_controller.php

<?php
class Atelierb1Controller extends AppController {

	var $name = 'Atelierb1';
}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp