CodeIgniter lost my session

[eluser]Lokut Da[/eluser]
[quote author="tkyy" date="1282883065"]as the first response said you should use database sessions[/quote]

Yes, i'm using database sessions. I configured my config.php file:

Code:

$config['sess_cookie_name']        = 'ci_session';
$config['sess_expiration']        = 7200;
$config['sess_encrypt_cookie']    = FALSE;
$config['sess_use_database']    = TRUE;
$config['sess_table_name']        = 'ci_sessions';
$config['sess_match_ip']        = FALSE;
$config['sess_match_useragent']    = TRUE;
$config['sess_time_to_update']     = 300;

And I have created the ci_sessions table.

[quote author="WanWizard" date="1282915073"]You shouldn’t use the session as a replacement for your database.[/quote]

Yes, i know, it is an example only I need session unlimited to my application, because i don't know how much Kb session i might need.

What do u think? (Sorry my english )

Thanks.