requested URL was not found on this server

[eluser]omidrs[/eluser]
Hi

So i am having some problems with codeigniter

I have it working on my localhost, but after having uploaded the files to my webserver i cannot get it working.

when i go to the main url eg www.example.com it works and load the homepage,
even www.example.com/index.php also works but not of my urls work. They all take me to a page not found. this is whether or not the index.php is in the url.

on my localhost i have all the settings to get the index.php out of the url. but on the webserver with all the same settings and the .htaccess file. none of the links work with or without the index.php in the url. I have spoken to someone at the webhosting service who tells me that all the wettings and the mod_rewrite stuff in the httpd.include file are all there.

Any help would be appreciated