Missing controller

You are seeing this error because controller DocumentsController could not be found.

Notice: this error is being rendered by the app/views/errors/missing_controller.thtml view file, a user-customizable error page for handling invalid controller dispatches.

Fatal: Unable to load controller DocumentsController

Fatal: Create Class:

<?php

class DocumentsController extends AppController {
}

?>

in file : app/controllers/documents_controller.php