File Caching does not work

[eluser]Unknown[/eluser]
I load the driver in the constructor:

Code:

public function __construct()
    {
        parent::__construct();
        $this->load->driver('cache');    
    }

I call savetocache:

Code:

public function savetocache()
    {
    
        if ( ! $foo = $this->cache->get('foo'))
        {
             echo 'Saving to the cache!<br />';
             $foo = 'foobarbaz!';

             $this->cache->file->save('foo', $foo, 300);

        }

        echo $foo;    
    }

Output (even if I refresh):

Code:

Saving to the cache!
foobarbaz!

I call testcache:

Code:

public function testcache(){
    
    var_dump($this->cache->get_metadata('foo'));

$foo = $this->cache->get('foo');
    
    echo $foo;
    
    }

Output:

Code:

bool(false)

I go to [app dir]/cache (CHMOD'd 777) and I see a file called "foo", output:

Code:

a:3:{s:4:"time";i:1302827920;s:3:"ttl";i:300;s:4:"data";s:10:"foobarbaz!";}

I'm running Code Igniter 2.0.2 with the following modification:

Fixed
./system/libraries/Driver.php
from
$filepath = $path.'libraries/'.$lib_name.'/drivers/'.$class.EXT;
to
$filepath = $path.'libraries/'.ucfirst($lib_name).'/drivers/'.$class.EXT;

Source: https://bitbucket.org/ellislab/codeignit...cache_file

Please help