URL problem from User Guide

[eluser]zqkun[/eluser]
I download CodeIgniter 2.1.0 and I followed the <a href="http://ellislab.com/codeigniter/user-guide/tutorial/" target="_blank">tutorial</a> on User Guide 2.1.0 to create a simple dynamic page, but when I try to submit a form with a URL

Code:

http://localhost/CodeIgniter/index.php/news/create

it always direct to this URL:

Code:

http://localhost/CodeIgniter/index.php/news/localhost/CodeIgniter/index.php/news/create

I tried to modify the routes.php, but it doesn't work. Anyone please help

routes.php

Code:

$route['news/create'] = 'news/create';
$route['news/(:any)'] = 'news/view/$1';
$route['news'] = 'news';
$route['(:any)'] = 'pages/view/$1';
$route['default_controller'] = 'pages/view';