Application in codeigniter does not run on the server (hostnet)

Hello, I uploaded a site to the hostnet server, private plan, local it is working properly but on the server, I do not use the last version of codeigniter 2.

My .htacess is like this

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1/$2 [L]
</IfModule>

I checked the case to be case sensitive, but this happens only in version 3.0

It's the first time I use codeigniter and I'm inexperienced yet so it might be some silliness.

Thank you in advance.