No change should need to be made to the pear path.
Pear is a package that is installed on your server, the pear package is used to pass the email SMTP server you specify.
it may be that your host has configured the server to block connections to outside SMTP servers.
in UE, set the GO TO page to be blank, then add the following code in the body tag of the page:
<?php @session_start(); var_dump($_SESSION); ?>
this will write the session contents to the page and include the email status, that may help in troubleshooting the cause of the problem.