custom post type categories not display checkboxes but text fileds

Why when I create a custom post type called profiles and and custom categories for profiles, do I not get the standard display of standard catergories instead I get a text box to say to seperate catergories by a comma in the profile admin page not the default checkbox display so my user can select the categories im u开发者_如何学Csing the

Make sure you create a Categories taxonomy and not a Tags one. See the hierarchical = TRUE for categories or hierarchical = FALSE for tags.