分页路由代码点火器不工作 404 错误

public function add_template(){
 $this->load->library('pagination');
     $config = array();
     $config['base_url'] =site_url('hradmin/dashboard/add_template');
     $config['total_rows'] = $this->hradvalid->add_temprow();
     $config['per_page'] = 2;
     $config['use_page_numbers'] = TRUE;
     $config['uri_segment']  = 4;
     $config['full_tag_open'] = "<ul class='pagination pagination-sm1>";
     $config['full_tag_close'] = '</ul>';
     $config['first_tag_open'] = '<li>';
     $config['first_tag_close'] = '</li>';
     $config['last_tag_open'] = '<li>';
     $config['last_tag_close'] = '</li>';
     $config['num_tag_open'] = '<li>';
     $config['num_tag_close'] = '</li>';
     $config['prev_tag_open'] = '<li>';
     $config['prev_tag_close'] = '</li>';
     $config['next_tag_open'] = '<li>';
     $config['next_tag_close'] = '</li>';
     $config['cur_tag_open'] = "<li class='active'><a>";
     $config['cur_tag_close'] = '</a></li>';
     $this->pagination->initialize($config); 
    $data['page']="hradmin/add_template";
    $data['template']=$this->hradvalid->hrget_product($config['per_page'],$this->uri->segment(4));
    $this->load->view('hradmin/dashboard',$data);
     }

这是config/routes.php中的路由代码

  `$route['hradmin'] = 'hradmin/admin';
  $route['hradmin/admin/dashboard/add_template:num'] ='hradmin/admin/dashboard/add_template/$1';`

hradmin这是我在视图目录中的目录名称

admin这是我的控制器 dashboard这是admin控制器中的方法，而同一控制器中的另一种方法add template在此方法中我的分页文件就在那里。

分页工作显示，但单击分页号错误404请帮助我谢谢