Custom taxonomies not copying

Hi,

Your plugin is really great, and your support is awesome!

I have problem with my custom post and connected custom taxonomy (both sites works on the same template, so both have registred the same elements).

I guess it is some setting problem.

My function.ph registration:

function my_custom_post_materials() {
    $labels = array(
        'name'                => _x( 'Materia?y', 'post type general name' ),
        'singular_name'       => _x( 'Materia?', 'post type singular name' ),
        'add_new'             => _x( 'Dodaj nowy materia?', 'book' ),
        'add_new_item'        => __( 'Dodaj nowy materia?' ),
        'edit_item'           => __( 'Edytuj materia?' ),
        'rewrite'             => array( 'slug' => 'materia?y' ),
        'new_item'            => __( 'Nowy materia?' ),
        'all_items'           => __( 'Wszystkie materia?y' ),
        'view_item'           => __( 'Poka? materia?' ),
        'search_items'        => __( 'Przeszukaj materia?y' ),
        'not_found'           => __( 'Nie znaleziono materia?u' ),
        'not_found_in_trash'  => __( 'Nie znaleziono materia?u w Koszu' ),
        'parent_item_colon'   => '',
        'menu_name'           => 'Materia?y'
    );
    $args = array(
        'labels'        => $labels,
        'description'   => 'Zawiera wszystkie materia?y wspó?dzielone poprzez WP MU',
        'public'        => true,
        'menu_position' => 5,
        'supports'      => array( 'title', 'editor'),
        'has_archive'   => true,
        'capability_type'     => 'post',
        'can_export'            => true,
        'publicly_queryable'    => true
    );
    register_post_type( 'materialy', $args );
}
add_action( 'init', 'my_custom_post_materials' );

function materials_taxonomy() {

    $labels = array(
        'name'                       => _x( 'Kategorie materia?ów', 'Taxonomy General Name', 'text_domain' ),
        'singular_name'              => _x( 'Kategoria materia?ów', 'Taxonomy Singular Name', 'text_domain' ),
        'menu_name'                  => __( 'Kategorie materia?ów', 'text_domain' ),
        'all_items'                  => __( 'Wszystkie', 'text_domain' ),
        'parent_item'                => __( 'Parent Item', 'text_domain' ),
        'parent_item_colon'          => __( 'Parent Item:', 'text_domain' ),
        'new_item_name'              => __( 'New Item Name', 'text_domain' ),
        'add_new_item'               => __( 'Add New Item', 'text_domain' ),
        'edit_item'                  => __( 'Edit Item', 'text_domain' ),
        'update_item'                => __( 'Update Item', 'text_domain' ),
        'view_item'                  => __( 'View Item', 'text_domain' ),
        'separate_items_with_commas' => __( 'Separate items with commas', 'text_domain' ),
        'add_or_remove_items'        => __( 'Add or remove items', 'text_domain' ),
        'choose_from_most_used'      => __( 'Choose from the most used', 'text_domain' ),
        'popular_items'              => __( 'Popular Items', 'text_domain' ),
        'search_items'               => __( 'Search Items', 'text_domain' ),
        'not_found'                  => __( 'Not Found', 'text_domain' ),
        'no_terms'                   => __( 'No items', 'text_domain' ),
        'items_list'                 => __( 'Items list', 'text_domain' ),
        'items_list_navigation'      => __( 'Items list navigation', 'text_domain' ),
    );
    $args = array(
        'labels'                     => $labels,
        'hierarchical'               => true,
        'public'                     => true,
        'show_ui'                    => true,
        'show_admin_column'          => true,
        'show_in_nav_menus'          => true,
        'show_tagcloud'              => true
    );
    register_taxonomy( 'materials_taxonomy', array( 'materialy' ), $args );

}
add_action( 'init', 'materials_taxonomy', 0 );

Settings of plugin – all checked.

If you could suggest something – it would be great.

THX

Raf