php - form validation not working Codeigniter -

i think doing right, why isnt validation working. every time else statement gets executed, if enter valid data.

public function login () {     // redirect user if he's logged in     $dashboard = base_url().'dashboard';     $this->user_model->loggedin() == false || redirect($dashboard);      // set form     $this->form_validation->set_rules('email','email','required');     $this->form_validation->set_rules('password','password','required');      // process form     if ($this->form_validation->run() == true) {          echo "validation success";     }else{          $this->session->set_flashdata('validation_errors', validation_errors().'<p>please enter valid email , password</p>' );         redirect(base_url().'login', 'refresh');      } 

edit

i using dreamhost vps .

unless on codeigniter project on server, use redirect('name_of_controller/name_of_method') there no need put base_url() because uses base url condition.

and on validation message set message $this->form_validation->set_message('rule','message')

read more @ http://ellislab.com/codeigniter/user-guide/libraries/form_validation.html#settingerrors

and have not showed view, show how post error message on view.

1.) have var_dump() of session if validation errors set

2.) have loaded session library?

3.) sure accessing proper session variables on view?