Missing Controller

Error: Backpacksc4Controller could not be found.

Error: Create the class Backpacksc4Controller below in file: app/controllers/backpacksc4_controller.php

<?php
class Backpacksc4Controller extends AppController {

	var $name = 'Backpacksc4';
}
?>

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