Custom Post Type UI error when adding taxonomy name

Hi. Great plugin, been using in a lot. I’ve come across a problem today which has never happened before. I’ve created a custom post type and a custom taxonomy for it with Custom Post Type UI plugin. Every time I add a new entry in the taxonomy it returns an error saying “You do not have permission to do that.”. The entry is entered normally besides that. I’ve inspected the error with Firefox and the div id=”ajax-response”(don’t know if that helps). And i haven’t made any custom post types entries yet.