Error with Cache Driver online.

[eluser]Unknown[/eluser]
So I am loading the cache driver like this

Code:

$this->load->library('cache', array('adapter' => 'file', 'backup' => 'file'));

which works fine on my local machine, but on the server I get the error

Code:

An Error Was Encountered
Unable to load the requested driver: CI_Cache_file

I guess it would be a problem with the capitalization, I had something like that before, put I can not figure it out.

I am running 2.1.3.