Same error without the path defined in UE regarding the path to PEAR:
""
Warning: require_once(Mail.php) [function.require-once]: failed to open stream: No such file or directory in E:\*****\WA_Universal_Email\PEAR_Mail_using_SMTP_PHP.php on line 115
Fatal error: require_once() [function.require]: Failed opening required 'Mail.php' (include_path='.;d:\php\includes;D:\PHP\PEAR') in E:\****\WA_Universal_Email\PEAR_Mail_using_SMTP_PHP.php on line 115
""
Note, that UE is looking for the referenced mail.php, which does not exist in pear