Ho un problema che non riesco a capire. Funzionava tutti, la sessione veniva passata e lo script faceva il suo lavoro. Ora però se apro la pagina del sottodominio che richiede la sessione mi da questo errore:

Warning: session_start() [function.session-start]: open(/var/lib/php5/sess_b880340c5ea708c133b88637a7f958ac, O_RDWR) failed: Permission denied (13) in /var/www/vhosts/schooldesk.it/subdomains/desk/httpdocs/index.php on line 4

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /var/www/vhosts/schooldesk.it/subdomains/desk/httpdocs/index.php:4) in /var/www/vhosts/schooldesk.it/subdomains/desk/httpdocs/index.php on line 4

Warning: Unknown: open(/var/lib/php5/sess_b880340c5ea708c133b88637a7f958ac, O_RDWR) failed: Permission denied (13) 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 (/var/lib/php5) in Unknown on line 0