Missing Method in NewsLetterController

Error: The action index is not defined in controller NewsLetterController

Error: Create NewsLetterController::index() in file: app/controllers/news_letter_controller.php.

<?php
class NewsLetterController extends AppController {

	var $name = 'NewsLetter';


	function index() {

	}

}
?>

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