Paging URI

[eluser]Unknown[/eluser]
Hi,

I'm having problem on handling pagination URI segments. It behaves nice when it recognized the page using a segmented value, but for the first page without any value in the segment it returns error.

For example :

http://localhost/ci/request.html/20 (this uri behaves correctly)
http://localhost/ci/request.html (this returns a '404 Page Not Found' message)

Here are the details of my configurations and codes. Please advice what went wrong ?

routes.php

Code:

$route['default_controller'] = "maincontroller";
$route['scaffolding_trigger'] = "scaffolding";
$route['article'] = "maincontroller/article";
$route['request'] = "maincontroller/request";
$route['request.html/:num'] = "maincontroller/request";

config.php

Code:

$config['base_url']    = "http://localhost/ci/";
$config['uri_protocol']    = "AUTO";
$config['url_suffix'] = ".html";

request.php controller

Code:

$this->load->library('pagination');
$config['full_tag_open'] = "<div class='paging'>";
$config['full_tag_close'] = "</div>";
$config['base_url'] = base_url() . "request.html";
$config['total_rows'] = '200';
$config['per_page'] = '20';
$config['first_link'] = '&lsaquo; Awal';
$config['uri_segment'] = 2;

$this->pagination->initialize($config);

$this->data["paging"] = $this->pagination->create_links();

Thanks,

JarBis