Атрибут пользовательской категории Magento не сохраняется

https://www.ashsmith.io/2013/03/quick-tip-adding-custom-category-attributes-to-magento/ Используя эту ссылку, я настроил свой собственный атрибут категории, он появляется в бэкэнд но он не сохранит, так что я могу получить и показать значение в интерфейсе.

var dump показывает это:

object(Mage_Catalog_Model_Category)[19]
protected '_eventPrefix' => string 'catalog_category' (length=16)
protected '_eventObject' => string 'category' (length=8)
protected '_cacheTag' => string 'catalog_category' (length=16)
protected '_useFlatResource' => boolean true
private '_designAttributes' => 
array (size=6)
  0 => string 'custom_design' (length=13)
  1 => string 'custom_design_from' (length=18)
  2 => string 'custom_design_to' (length=16)
  3 => string 'page_layout' (length=11)
  4 => string 'custom_layout_update' (length=20)
  5 => string 'custom_apply_to_products' (length=24)
protected '_treeModel' => null
protected '_urlModel' => null
protected '_defaultValues' => 
array (size=0)
  empty
protected '_storeValuesFlags' => 
array (size=0)
  empty
protected '_lockedAttributes' => 
array (size=0)
  empty
protected '_isDeleteable' => boolean true
protected '_isReadonly' => boolean false
protected '_resourceName' => string 'catalog/category_flat' (length=21)
protected '_resource' => null
protected '_resourceCollectionName' => string   'catalog/category_flat_collection' (length=32)
protected '_dataSaveAllowed' => boolean true
protected '_isObjectNew' => null
protected '_data' => 
array (size=37)
  'entity_id' => string '321' (length=3)
  'parent_id' => string '2' (length=1)
  'created_at' => string '2015-02-02 14:50:55' (length=19)
  'updated_at' => string '2015-02-23 12:33:52' (length=19)
  'path' => string '1/2/321' (length=7)
  'position' => string '2' (length=1)
  'level' => string '2' (length=1)
  'children_count' => string '23' (length=2)
  'store_id' => string '1' (length=1)
  'all_children' => null
  'available_sort_by' => null
  'children' => null
  'custom_apply_to_products' => string '0' (length=1)
  'custom_design' => null
  'custom_design_from' => null
  'custom_design_to' => null
  'custom_layout_update' => null
  'custom_use_parent_settings' => string '0' (length=1)
  'default_sort_by' => null
  'description' => string '<div><img class="catimage" src="/skin/frontend/waterlee-boilerplate/default/images/columbarium-binnen.jpg" />

<div class="catdescription">

 <div class="cattitle"><h1>Urnen</h1></div>

  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed porta arcu vel dictum volutpat. Praesent molestie dolor at vehicula consectetur. Praesent dictum, ipsum ac porta dignissim, arcu purus mattis tellus, tempus semper ex ligula quis magna. per inceptos himenaeos.</div>

</div>

<p style="text-align: center;"><span>Uitv'... (length=771)
  'display_mode' => string 'PAGE' (length=4)
  'filter_price_range' => null
  'image' => null
  'include_in_menu' => string '1' (length=1)
  'is_active' => string '1' (length=1)
  'is_anchor' => string '0' (length=1)
  'landing_page' => string '15' (length=2)
  'meta_description' => string 'a' (length=1)
  'meta_keywords' => null
  'meta_title' => null
  'name' => string 'Urnen' (length=5)
  'page_layout' => null
  'path_in_store' => null
  'thumbnail' => null
  'url_key' => string 'urnen' (length=5)
  'url_path' => string 'urnen-17.html' (length=13)
  'path_ids' => 
    array (size=3)
      0 => string '1' (length=1)
      1 => string '2' (length=1)
      2 => string '321' (length=3)
  protected '_hasDataChanges' => boolean true
  protected '_origData' => 
array (size=36)
  'entity_id' => string '321' (length=3)
  'parent_id' => string '2' (length=1)
  'created_at' => string '2015-02-02 14:50:55' (length=19)
  'updated_at' => string '2015-02-23 12:33:52' (length=19)
  'path' => string '1/2/321' (length=7)
  'position' => string '2' (length=1)
  'level' => string '2' (length=1)
  'children_count' => string '23' (length=2)
  'store_id' => string '1' (length=1)
  'all_children' => null
  'available_sort_by' => null
  'children' => null
  'custom_apply_to_products' => string '0' (length=1)
  'custom_design' => null
  'custom_design_from' => null
  'custom_design_to' => null
  'custom_layout_update' => null
  'custom_use_parent_settings' => string '0' (length=1)
  'default_sort_by' => null
  'description' => string '<div><img class="catimage" src="/skin/frontend/waterlee-boilerplate/default/images/columbarium-binnen.jpg" />

 <div class="catdescription">

 <div class="cattitle"><h1>Urnen</h1></div>

  Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed porta arcu vel dictum volutpat. Praesent molestie dolor at vehicula consectetur. Praesent dictum, ipsum ac porta dignissim, arcu purus mattis tellus, tempus semper ex ligula quis magna. per inceptos himenaeos.</div>

 </div>

 <p style="text-align: center;"><span>Uitv'... (length=771)
  'display_mode' => string 'PAGE' (length=4)
  'filter_price_range' => null
  'image' => null
  'include_in_menu' => string '1' (length=1)
  'is_active' => string '1' (length=1)
  'is_anchor' => string '0' (length=1)
  'landing_page' => string '15' (length=2)
  'meta_description' => string 'a' (length=1)
  'meta_keywords' => null
  'meta_title' => null
  'name' => string 'Urnen' (length=5)
  'page_layout' => null
  'path_in_store' => null
  'thumbnail' => null
  'url_key' => string 'urnen' (length=5)
  'url_path' => string 'urnen-17.html' (length=13)
  protected '_idFieldName' => string 'entity_id' (length=9)
  protected '_isDeleted' => boolean false
  protected '_oldFieldsMap' => 
array (size=0)
  empty
 protected '_syncFieldsMap' => 
array (size=0)
  empty