Missing Controller

Error: 850x150.gifController could not be found.

Error: Create the class 850x150.gifController below in file: app/controllers/850x150.gif_controller.php

<?php
class 850x150.gifController extends AppController {

	var $name = '850x150.gif';
}
?>

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