Why does seesion expire too soon?

[eluser]behnampmdg3[/eluser]
[quote author="InsiteFX" date="1355559643"]If you are using IE then you need to change this.

Code:

$config['sess_cookie_name']  = 'ci_session';
to
$config['sess_cookie_name']  = 'cisession';

Also IE neeeds to be setup to allow session cookies under tools options.
[/quote]I am updating my code but this is rather strange! I want to make robust code that works on every browser!
Thank you