How to create a custom entity to work well with entity translation

Dear all,

I just create a custom entity in Drupal 7. I would like to make it work with entity translation as I plan to use in multilingual website.
The custom entity seem working find with Drupal field API and any entity operations (CRUD operation). I tried to enable Entity Translation, the "Translate" tab is displayed and also can see translation overview page. When I click to add translate, it saved the data (it mean when visiting page with certain language, it display correctly with current data language), but when I go to translate overview page again, it still have no translated. How come? Help please......

Please see the image below:

Before and after translated, this page still the same.

The original source:

Translated:

- Here is my table schema:

$schema = array(
        'description' => 'Stores identity information of users.',
        'fields' => array(
            'uid' => array(
                'type' => 'int',
                'not null' => TRUE,
                'disp-width' => '11',
            ),
            'name' => array(
                'type' => 'varchar',
                'length' => '255',
                'not null' => TRUE,
                'default' => '',
            ),
            'language' => array(
                'type' => 'varchar',
                'length' => 32,
                'not null' => FALSE,
            ),
            'created' => array(
                'type' => 'int',
                'not null' => TRUE,
                'disp-width' => '11',
                'default' => 0,
            ),
            'changed' => array(
                'type' => 'int',
                'not null' => TRUE,
                'disp-width' => '11',
                'default' => 0,
            ),
            'updater_uid' => array(
                'type' => 'int',
                'not null' => TRUE,
                'disp-width' => '11',
                'default' => 0,
            )
        ),
        'primary key' => array('uid'),
    );

- hook_entity_info:

function identity_entity_info() {
    $return['identity'] = array(
        'label' => t('Identity'),
        'entity class' => 'Identity',
        'plural label' => t('Identities'),
        'base table' => 'identity',
        'revision table' => 'identity_revision',
        'description' => t('Identity information of users.'),
        'controller class' => 'EntityIdentityController',
        'fieldable' => TRUE,
        'exportable' => FALSE,
        'entity keys' => array(
            'id' => 'uid',
            'label' => 'name',
            'translations' => 'translations'
        ),
        'bundles' => array(
            'identity' => array(
                'label' => t('Identity'),
                'admin' => array(
                    'path' => 'admin/structure/identity/manage/identity',
                    'real path' => 'admin/structure/identity/manage/identity',
                ),
            ),
        ),
        'view modes' => array(
            'full' => array(
                'label' => t('User account'),
                'custom settings' => FALSE,
            ),
        ),
        'admin ui' => array(
            'path' => 'admin/structure/identity',
            'controller class' => 'IdentityUIController',
        ),
        'access callback' => 'identity_access',
        'module' => 'identity',
        'translation' => array(
            'locale' => TRUE,
            'entity_translation' => array(
                'class' => 'EntityTranslationDefaultHandler',
                'default settings' => array(
                    'default_language' => LANGUAGE_NONE,
                    'hide_language_selector' => FALSE,
                ),
                'base path' => 'identity/%identity',
                'path wildcard' => '%identity',
                'access callback' => 'identity_entity_translation_tab_access'
            ),
        ),
    );
    return $return;
}

Really appreciate for your help!