polecat on "Tags for custom post_type"

On my website I've some post_type like: services, portfolio etc.
For post_type services I've a specific service-tags.
When I click on a first inserted tag-service, wordpress gave me a correct post. If I click any other services taxonomies wordpress respond with not found.
To insert service-tags I had put this code on file function.php

//create two taxonomies, genres and tags for the post type "tag"
function create_tag_taxonomies()
{
  // Add new taxonomy, NOT hierarchical (like tags)
  $labels = array(
    'name' => _x( 'Tags Servizi', 'taxonomy general name' ),
    'singular_name' => _x( 'Tag Servizi', 'taxonomy singular name' ),
    'search_items' =>  __( 'Search Tags Servizi' ),
    'popular_items' => __( 'Popular Tags Servizi' ),
    'all_items' => __( 'All Tags Servizi' ),
    'parent_item' => null,
    'parent_item_colon' => null,
    'edit_item' => __( 'Edit Tag Servizi' ),
    'update_item' => __( 'Update Tag Servizi' ),
    'add_new_item' => __( 'Add New Tag Servizi' ),
    'new_item_name' => __( 'New Tag Name Servizi' ),
    'separate_items_with_commas' => __( 'Separate tags Servizi with commas' ),
    'add_or_remove_items' => __( 'Add or remove tags Servizi' ),
    'choose_from_most_used' => __( 'Choose from the most used tags Servizi' ),
    'menu_name' => __( 'Tags Servizi' ),
  ); 

  register_taxonomy('tag-servizi','service',array(
    'hierarchical' => false,
    'labels' => $labels,
    'show_ui' => true,
    'update_count_callback' => '_update_post_term_count',
    'query_var' => true,
    'rewrite' => array( 'slug' => 'tag-servizi' ),
  ));
}