AJAX and CI Session (v1.7) w/DB

[eluser]InsiteFX[/eluser]
You can try this is works for me.

Code:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* ------------------------------------------------------------------------
* Created by Php Designer 8.1.2.
* Date : 5/6/2012
* Time : 11:19:06 PM
* The Learn CodeIgniter Development Team.
* ------------------------------------------------------------------------
*
* Class MY_Session
*
* @package  Package  CodeIgniter
* @subpackage Subpackage session
* @category category sessions
* @author  Raymond L King Sr.
* @link  http://example.com
* ------------------------------------------------------------------------
* To change this template use File | Settings | File Templates.
* ------------------------------------------------------------------------
*/

/**
* ------------------------------------------------------------------------
* CI Session Class Extension for AJAX calls.
* ------------------------------------------------------------------------
*
* ====- Save as application/libraries/MY_Session.php -====
*/

class MY_Session extends CI_Session {

// --------------------------------------------------------------------

/**
  * sess_update()
  *
     * Do not update an existing session on ajax or xajax calls
     *
     * @access    public
     * @return    void
     */
    public function sess_update()
{
  $ci = get_instance();

  if ( ! $ci->input->is_ajax_request())
  {
   parent::sess_update();
  }
    }

} // End of class MY_Session.

/* ------------------------------------------------------------------------
* Filename: MY_Session.php
* Location: ./application/libraries/MY_Session.php
* ------------------------------------------------------------------------
*/