Intallation cms agora sous free

Bonjour,

j'ai créer un fichier sessions et j'ai cette erreur

Warning: session_start() [function.session-start]: open(/mnt/102/sdb/9/6/lepurbienetre/sessions/sess_880e4e3739428f4b1ac43650c13be5d4, O_RDWR) failed: No such file or directory (2) in /mnt/102/sdb/9/6/lepurbienetre/agora/install/index.php on line 4

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /mnt/102/sdb/9/6/lepurbienetre/agora/install/index.php:4) in /mnt/102/sdb/9/6/lepurbienetre/agora/install/index.php on line 4

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /mnt/102/sdb/9/6/lepurbienetre/agora/install/index.php:4) in /mnt/102/sdb/9/6/lepurbienetre/agora/install/index.php on line 4

Warning: Unknown(): open(/mnt/102/sdb/9/6/lepurbienetre/sessions/sess_880e4e3739428f4b1ac43650c13be5d4, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/mnt/102/sdb/9/6/lepurbienetre/sessions) in Unknown on line 0

merci par avance