I cannot read bounces messages on dashboard

Hi,
I have trouble with bounces messages: I receive them at my email address but I can’t read them at phplist dashboard.
Here my config file:
$message_envelope = ‘listbounces@mydomain.it’;
$bounce_protocol = ‘pop’;
define(‘MANUALLY_PROCESS_BOUNCES’, 1);
$bounce_mailbox_host = ‘localhost’;
$bounce_mailbox_user = ‘listbounces@mydomain.it’;$bounce_mailbox_password = ‘mypassword’;
$bounce_mailbox_port = “995/pop3/ssl/novalidate-cert”;
$bounce_mailbox_purge = 1;
$bounce_mailbox_purge_unprocessed = 1;
$bounce_unsubscribe_threshold = 5;
define(‘HASH_ALGO’, ‘sha256’);
$default_system_language = ‘it’;

I have not any record into php_user_message_bounce and into php_bounce tables

Anybodies knwos where I mistake?
Thank you for any suggest.
Renato