Missing Controller

Error: Sostenible.phpController could not be found.

Error: Create the class Sostenible.phpController below in file: app/controllers/sostenible.php_controller.php

<?php
class Sostenible.phpController extends AppController {

	var $name = 'Sostenible.php';
}
?>

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