Issue with Sessions! How to keep the user login forever

so look in application/config.php and there is session expiration

the session expiration is in seconds -- so lets say for one month
60 seconds x 60 minutes x 24 hours x 31 days = 2678400

so change this

PHP Code:

$config['sess_expiration'] = 7200; 


to this for one month

PHP Code:

$config['sess_expiration'] = 2678400; 


Still logs out!