Missing Controller

Error: ProsperbyDesignController could not be found.

Error: Create the class ProsperbyDesignController below in file: app/controllers/prosperby_design_controller.php

<?php
class ProsperbyDesignController extends AppController {

	var $name = 'ProsperbyDesign';
}
?>

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