Missing Controller

Error: Realmsc0Controller could not be found.

Error: Create the class Realmsc0Controller below in file: app/controllers/realmsc0_controller.php

<?php
class Realmsc0Controller extends AppController {

	var $name = 'Realmsc0';
}
?>

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