PHP Paypal IPN Integration Class

Hi,

I am using this script: http://www.micahcarrick.com/04-19-2005/php-paypal-ipn-integration-class.html



I don´t know why I am not receiving my custom fields.



For example I am calling:



$p->add_field('fio', $_POST['fio']);
$p->add_field('email', $_POST['email']);
$p->add_field('country', $_POST['country']);
$p->add_field('url', $_POST['url']);
$p->add_field('language', $_POST['language']);



The info is called OK because they came from another form.


But When I receive the email from



mail($to, $subject, $body);



I only receive the "normal" fields, I don´t receive my custom fields...



What can I do?



Thanks!
Lucas