Problem paging php

[eluser]Unknown[/eluser]
$this->load->library('pagination');
$this->load->helper('url');
$config['base_url'] = base_url().'sms/queue/index';
$config['total_rows'] = $countpage['data']->gtotal;
$config['per_page'] = 5;
$config['num_links'] = 5;
$config['uri_segment'] = 4;
$config['full_tag_open'] = '<div>';
$config['full_tag_close'] = '</div>';
$this->pagination->initialize($config);

$this->tttmodel->loadqueue('user',$config['per_page'],$this->uri->segment(4));

Problem paging php