CustomPress Issue with Gravity Forms & Gravity Forms + Custom Post Types


I purchased CustomPress because I really didn’t understand post types or taxonomies and it advertised as a simple way to get acquainted with them and use them in WordPress. However, I have been attempting to create a new form in Gravity Forms with the Custom Post Types plugin — the whole point of having Custom Press and the other plugins really (a front-end for users to create posts that are really bookmarks with attached info) — however, though the custom taxonomies are available for use, the custom fields never appear in the drop-down of “existing custom fields” for selection. I have selected the checkbox that theoretically makes the fields available to WP and other plugins, so I do not know what is wrong.

Please help!