CodeIgniter: 404 Page not Found

I think you must set AcceptPathInfo in httpd.conf

AcceptPathInfo fails in conjuction with PHP. AcceptPathInfo is supposed to allow scripts such as
www.server.com/script.php to be referenced with additional URI
information to be passed to the script such as
www.server.com/script.php/value/value2. PHP calls this value PATH_INFO.

<Directory />
Options FollowSymLinks
AllowOverride None
AcceptPathInfo On
</Directory>