custom fields data is not displayed in the site

Hi,
I installed CustomPress in fresh install of WP 3.0.4.
I did the tutorial of Books database.
I am able to enter the custom fields data (Year and Book Rating) when adding a New Book.
Everything works fine, except that there is no way to add/assign Genre and/or Author. This is the message displayed under Genre and Author:
"You cannot modify this taxonomy."

The other issue is that taxonomies and custom posts data are not displayed in the live site, even though the file single-books.php was succesfully created by the plugin and modified as instructed in the tutorial.

Our test site is gloti.com

Thanks for your help.