AmazonSESMailer not found error

[zeeo]

Trying out a very simple service from AWS using Simple Email SendMy script looks like this:\[code\]require_once('aws.phar');$mailer = new AmazonSESMailer($my_id, $my_key);\[/code\]The error I get is Fatal error: Class 'AmazonSESMailer' not found Do I need more then the aws.phar file?