Please help Session

[eluser]Zeeshan Rasool[/eluser]
This issue is common in CI development and I faced many times. You should enable error reporting in index.php and always try to remove php warnings, bugs, errors so that this can be a big reason for session problem.
Also just create a Session.php file paste code I have attached with reply and put this file in application/libraries/

I downloaded this class from a site (not remembered sorry). This will hope fix your problem.