Proper way to cache custom entities with Entitycache?

I am trying to figure out how to cache custom entities with Entitycache module:

created cache table for own entity: cache_entity_carroza_user

created own controller, extent EntityCacheDefaultEntityController, implemented EntityAPIControllerInterface:

<?php
class CarrozaEntityController extends EntityCacheDefaultEntityController implements EntityAPIControllerInterface {
  ...
}

?>

implemented hook_entity_info, specified entity controller:

<?php
$return = array(
  'carroza_user' => array(
    'label' => t('Carroza User'),
    'controller class' => 'CarrozaUserEntityController',
....


if(module_exists('entitycache')) {
  $return['carroza_user']['field cache'] = FALSE;
  $return['carroza_user']['entity cache'] = TRUE;
}
?>

created CarrozaUserEntityController:

<?php
class CarrozaUserEntityController extends CarrozaEntityController {
  public function __construct($entityType) {
    parent::__construct($entityType);
  }

  public function resetCache(array $ids = NULL) {
    EntityCacheControllerHelper::resetEntityCache($this, $ids);
    parent::resetCache($ids);
  }

  public function load($ids = array(), $conditions = array()) {
    return EntityCacheControllerHelper::entityCacheLoad($this, $ids, $conditions);
  }


  public function create(array $values = array()) {
    $values += array(
      'carroza_uid' => '',
      'is_new' => TRUE,
      ...
    );

    $carroza_user = parent::create($values);
    return $carroza_user;
  }

  public function save($carroza_user, DatabaseTransaction $transaction = NULL) {
    return parent::save($carroza_user, $transaction);
  }
}
?>

I'm doing everything Entitycache documentation says, but can't see any records in cache_entity_carroza_user table. Am I missing something else?