I prefer not to for the moment, but maybe the log can help you :
mod_fcgid: stderr: PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 6000 bytes) in /var/www/vhosts/mydomain.com/httpdocs/wp-includes/media.php on line 2043, referer: http://www.mydomain.com/wp-admin/admin.php?page=GrandMedia&do_update=gmedia