[SOLVED] uploading my web to web server

[eluser]atoleon[/eluser]
Hi

I have created a web page using CodeIgniter. I have tryed in my localhost and it works well.
But, when i have upaloaded to my web server start the troubles.

I just can see the default controller. If i try to access to any controller the server show error 404 and dont find the page.
My domain is http://atos.host56.com and i write that in the $base_url in config.php.
If i write http://atos.host56.com in my web browser i can see the index page (the default controller) but i write http://atos.host56.com/anyController the server show error 404.

What can i do? you can acces to my web to check this error.

thanks for your help