Missing Controller

Error: 21w.cakeController could not be found.

Error: Create the class 21w.cakeController below in file: app/controllers/21w.cake_controller.php

<?php
class 21w.cakeController extends AppController {

	var $name = '21w.cake';
}
?>

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