Missing Method in BuyController

You are seeing this error because the action combo is not defined in controller BuyController

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

Fatal: Confirm you have created the BuyController::combo() in file : app/controllers/buy_controller.php

<?php
class BuyController extends AppController {
   function combo() {
   }
}
?>