metabox on plugin page with custom post type & taxonomy

Hi,
making a plugin with custom post types and custom categories.
and im need multiple instances of the side (custom category) meta box on the plugin page.

i have an ported an edited version of post_categories_meta_box() , which im calling directly,… without the add_action() ..

and the category js from wp-admin/js/post.dev.js,

everything works fine, except it just wont add, ( the ajax part ), clicking on “add new category”, i do get the textbox and parent category dropdown, but it wont post/ add,

something to do with wpList(), … if someone can point me in the right direction. on what im missing.