Don't redirect

[eluser]mikevu[/eluser]
Hello,
I have a form to update.
When I update my data complete but redirect don't run
This is my code:
if ($this->form_validation->run() == TRUE)
{
$this->settings->update_settings(); //OK, tested;
$this->session->set_flashdata('message', lang('successfully_updated')); //OK tested
redirect('admin/settings', 'refresh'); // Don't work. WHY??

}

Please Help me.
Thank