CodeIgniter route does not work

Hello, 

I am working on old CodeIgniter 2 project I added a new route to application/config/routes.php 

here is the new file:

$route['products'] = 'products/index';
$route['product/(:num)'] = 'products/single/$1';
$route['(:any)'] = 'pages/$1';
$route['product/(:any)'] = 'products/search/$1';

$route['default_controller'] = "home";
$route['404_override'] = '';

the request does not go to Products class, it returns 404 not found 

Here is my controller:

<?php
class Products extends CI_Controller {

 public function index()
 {
 #### Some Code ####
 }
 
 public function single($id)
 {
 #### Some Code ####
 }
 
 public function search($text)
 {
 #### Some Code ####
 }
}

Any help,

Thanks