[Mediawiki-l] Fatal error

[KAMOHELO MOFOKENG]

Hi All,
 
I'm new to PHP & I'm trying to send mail using PHPMailer & I get the following error:
 
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Warning: require_once( ) [function.require-once]: failed to open stream: Permission denied in C:\xampp\htdocs\mediawiki\includes\UserMailer.php on line 119

Fatal error: require_once() [function.require]: Failed opening required ' ' (include_path='C:\xampp\htdocs\mediawiki;C:\xampp\htdocs\mediawiki\includes;C:\xampp\htdocs\mediawiki\languages;C: mpp\php\PHPMailer_v5.1\class.phpmailer.php;C: mpp\php\PHPMailer_v5.1\class.smtp.php;.;C:\xampp\php\PHPMailer_v5.1\class.phpmailer.php;C:\xampp\php\PHPMailer_v5.1\class.smtp.php') in C:\xampp\htdocs\mediawiki\includes\UserMailer.php on line 119

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line 119 in UserMailer.php is: 
require_once(' ');
 
& my include_path in the php.ini file is: ".;C:\xampp\php\PHPMailer_v5.1\class.phpmailer.php;C:\xampp\php\PHPMailer_v5.1\class.smtp.php"
 
When I leave the default require_once ('mail.php'), my error becomes:
 
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Fatal error: Class 'Mail' not found in C:\xampp\htdocs\mediawiki\includes\UserMailer.php on line 154

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What parameter should I pass to the require_once() method?
 
Thanks in advance.
Kamo