In CustomPress, I can create a Post Type fine, but the Custom Fields do not show this post type in the select box. I also do not see the custom post type in the main admin menu on the left of the screen within my site (not the network admin) with the other post types like Post, Pages...etc.
I initially installed CustomPress via the WPMU DEV center and didn't see the Post Type I created under the Custom Fields -> Post Type select box.
I then deleted all of the Custom Post Types and Custom Fields, uninstalled the plugin and removed all of the files from the plugin directory.
I manually downloaded the zip from the CustomPress page and installed it via FTP and continue to have the same problem.
I attached two screen shots.