Missing Controller

Error: Disk54b2bController could not be found.

Error: Create the class Disk54b2bController below in file: app/controllers/disk54b2b_controller.php

<?php
class Disk54b2bController extends AppController {

	var $name = 'Disk54b2b';
}
?>

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