strange problem in my view,has anyone help me?

[eluser]chmod[/eluser]
But I change the filename:

Code:

function index(){
            $data = array('title' => $this->lang->line('title_center_index'));
            $this->load->view('center/loginto_tpl',$data);
        }

login_tpl to loginto_tpl or test_tpl and so on,
the problem is disapper.my god!!!
why?