Missing Controller

Error: CampaignsController could not be found.

Error: Create the class CampaignsController below in file: showstudio/controllers/campaigns_controller.php

<?php
class CampaignsController extends AppController {

	var $name = 'Campaigns';
}
?>

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