Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/web5/html/classes/HTML_ToPDF.php on line 20

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.') in /var/www/web5/html/classes/HTML_ToPDF.php on line 20