session data lost after redirect

I purpose you to use CI session methods as:

PHP Code:

// To get specific userdata
$this->session->userdata('item');
// If you want to specify the item
$this->session->item; 


Can you show what exactly you set and how you redirect..

Yes this is my code in  login_model 

            $data =  $this->public_model->DB_Action('get','user_profile',
                array('upro_uacc_fk' => $current_user_id))->row_array();
            $this->session->set_userdata('user_pro',$data);

            redirect('admin');

and i check   in admin Controller

print_r($this->session->all_userdata());