Kohana 3.3和apc

I trying to use apc in kohana 3.3 and i have a small problem. If i used original apc query like apc_add('name', $data, 86400); it's working pretty good, but my kohana's query like that does not work.

Query:

$stat = false;
$object = Cache::instance()->get('admin_products1', FALSE);

if ($stat === $object) {
    $model = new Model_Main();
    $object = $model->product_name();
    Cache::instance()->set('admin_products1', $object, 60);
}

return $object;

Configuration in config/cache.php:

<?php defined('SYSPATH') or die('No direct script access.');
return array(
    'apc' => array(
        'driver' => 'apc',
        'default_expire' => 60,
    )
);

I also added this line to bootstrap: Cache::$default = 'apc';

I thought that this should work but it just returns a blank page. Why isn't it working?