Breadcrumb problem with Custom Post Type

Hi,
when viewing a single custom post type the breadcrumb navigation always returns a list of categories.

Example: http://goo.gl/862oc3.

The custom post type is amm-trasparente and is completely separated from WordPress categories (it has its own taxonomy).

Plugin url (i am the developer): ww.wp.xz.cn/plugins/amministrazione-trasparente