Missing Method in CasestudiesController

You are seeing this error because the action spatube is not defined in controller CasestudiesController

If you want to customize this error message, create app/views/errors/missing_action.thtml.

Fatal: Confirm you have created the CasestudiesController::spatube() in file : app/controllers/casestudies_controller.php

<?php
class CasestudiesController extends AppController {
   function spatube() {
   }
}
?>