extplorer

Bonjour

Je monte un site pour une association. Joomla 2.5 template gantry. J'utilise l'extention Extplorer. en local, pas de problème.j'ai installé joomla sur le serveur mavenhosting et la inpossible de ma,servir d'extplorer. 3 messages:
1- Warning: require_once() [function.require-once]: SAFE MODE Restriction in effect. The script whose uid is 808 is not allowed to access /usr/lib/php/PEAR.php owned by uid 0 in /home/rdsfr/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 33
2- Warning: require_once(/usr/lib/php/PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /home/rdsfr/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 33
3- Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/rdsfr/public_html/administrator/components/com_extplorer/libraries/FTP.php on line 33.

Bon si quelqu'un a un idée.
Merci