Why can't see session in codeigniter from another controller? -

i have 2 controllers

1-connect facebook

2-connect create

when want register click on connect_facebook.php , controller info data , set in session, fill form , send data connect_create.php. problem connect_create controller can't see session ever, why?

<?php  /*  * connect_facebook website  */  class connect_facebook extends website {      /**      * constructor      */     function __construct() {         parent::__construct();          // load necessary stuff...         $this->load->config('account');         $this->load->helper('form');         $this->load->helper(array('language', 'ssl', 'url'));         $this->load->library(array('authentication', 'facebook_lib'));         $this->load->model(array('account_model', 'account_facebook_model'));         $this->load->language(array('general', 'sign_in', 'account_linked', 'connect_third_party'));     }      function index() {         // enable ssl?         maintain_ssl($this->config->item("ssl_enabled"));          // check if user signed in on facebook         if ($this->facebook_lib->user) {             // check if user has connect facebook a3m             if ($user = $this->account_facebook_model->get_by_facebook_id($this->facebook_lib->user['id'])) {                 // check if user not signed in on a3m                 if (!$this->authentication->is_signed_in()) {                     // run sign in routine                     $this->authentication->sign_in($user->account_id);                 }                 $user->account_id === $this->session->userdata('account_id') ? $this->session->set_flashdata('linked_error', sprintf(lang('linked_linked_with_this_account'), lang('connect_facebook'))) : $this->session->set_flashdata('linked_error', sprintf(lang('linked_linked_with_another_account'), lang('connect_facebook')));                 redirect('users/account_linked');             }             // user has not connect facebook a3m             else {                 // check if user signed in on a3m                 if (!$this->authentication->is_signed_in()) {                     // store user's facebook data in session                     $this->session->set_userdata('connect_create', array(array('provider' => 'facebook', 'provider_id' => $this->facebook_lib->user['id']), array('fullname' => $this->facebook_lib->user['name'], 'firstname' => $this->facebook_lib->user['first_name'], 'lastname' => $this->facebook_lib->user['last_name'], 'gender' => $this->facebook_lib->user['gender'], 'email' => $this->facebook_lib->user['email'],                     // not required field, not users have set                             'picture' => 'http://graph.facebook.com/' . $this->facebook_lib->user['id'] . '/picture/?type=large' // $this->facebook_lib->user['link']                             )));                     // send data user submit form                      $data['locale'] = $this->facebook_lib->user['locale'];                     $data['session'] = $this->session->userdata('connect_create');                     $data['facebook_id'] = $this->facebook_lib->user['id'];                     $data['username'] = $this->facebook_lib->user['name'];                     $data['gender'] = $this->facebook_lib->user['gender'];                     $data['email'] = $this->facebook_lib->user['email'];                     $this->view('site/connect_create', $data);                  } else {                     // connect facebook a3m                     $this->session->userdata('account_id');                     $this->session->set_flashdata('linked_info', sprintf(lang('linked_linked_with_your_account'), lang('connect_facebook')));                     redirect('user/account_linked');                 }             }         }          // load facebook redirect view         $this->load->view("site/redirect_fb");     }  } 

connect_create controller

class connect_create extends website {      /**      * constructor      */     function __construct()     {         parent::__construct();          // load necessary stuff...         $this->load->config('account');         $this->load->helper(array('language', 'ssl', 'url'));         $this->load->library(array('authentication', 'form_validation'));         $this->load->model(array('account_model', 'account_details_model', 'account_facebook_model'));         $this->load->language(array('general', 'connect_third_party'));     }      /**      * complete facebook's authentication process      *      * @access public      * @return void      */     function index()     {         // enable ssl?         maintain_ssl($this->config->item("ssl_enabled"));          // redirect user home if sign ups disabled         if ( ! ($this->config->item("sign_up_enabled"))) redirect('tttt');          // redirect user home if 'connect_create' session data doesn't exist         if ( ! $this->session->userdata('connect_create')) redirect('bbbbbb');            $data['connect_create'] = $this->session->userdata('connect_create');          // setup form validation         $this->form_validation->set_error_delimiters('<span class="field_error">', '</span>');         $this->form_validation->set_rules(array(array('field' => 'connect_create_username', 'label' => 'lang:connect_create_username', 'rules' => 'required'), array('field' => 'connect_create_email', 'label' => 'lang:connect_create_email', 'rules' => 'trim|required|valid_email|max_length[160]')));          // run form validation         if ($this->form_validation->run())         {             // check if username exist             if ($this->username_check($this->input->post('connect_create_username', true)) === true)             {                 $data['connect_create_username_error'] = lang('connect_create_username_taken');             }             // check if email exist             elseif ($this->email_check($this->input->post('connect_create_email'), true) === true)             {                 $data['connect_create_email_error'] = lang('connect_create_email_exist');             }             else             {                 // destroy 'connect_create' session data                 $this->session->unset_userdata('connect_create');                  // create user                 $user_id = $this->account_model->create();                                 // add user details                 $this->account_details_model->update($user_id, $data['connect_create'][1]);                   // connect third party account user                 switch ($data['connect_create'][0]['provider'])                 {                     case 'facebook':                         $this->account_facebook_model->insert($user_id, $data['connect_create'][0]['provider_id']);                         break;                 }                  // run sign in routine                 $this->authentication->sign_in($user_id);             }         }          $this->load->view('site/connect_create', isset($data) ? $data : null);     } 

go config.php located in application/config folder

set $config['cookie_domain']="";

give try.

and try load session library in auto load config

application/config/autoload.php

$autoload['libraries'] = array('session');