CodeIgniter 404

我是新来的codeIgnitor，并不断得到错误404，请告知我在哪里出错，下面是我的结构和页面。数据库名称:stoma_store_suppliers，数据库字段:supplierid, supplier_name, supplier_phone

Models Page:_____________ providers .php

<?php
Class Suppliers extends CI_Model
{
 public function get_suppliers($supplierid) {
if($supplierid != FALSE) {
$query = $this->db->get_where('store_suppliers', array('supplierid'    =>$supplierid));
return $query->row_array();
}
else {
return FALSE;
}
}
}
?>

页面控制器 __________suppliers.php

<?php if (!defined('BASEPATH'))exit('No direct script access allowed');
class Suppliers extends CI_Controller {
public function show($supplierid) {
$this->load->model('suppliers');
$store_suppliers = $this->suppliers->get_suppliers($supplierid);
$data['supplier_name'] = $suppliers['supplier_name'];
$data['supplier_phone'] = $suppliers['supplier_phone'];
$this->load->view('index', $data);
}
}
?>

视图页面:index . php

<?php print $supplier_name; ?>
<?php print $supplier_phone; ?>