Can't get custom Taxonomies to work with CustomPress

I now know that I have to use custom categories/tags with custompress for everything to work correctly. I set up a text taxonomy to see if it would work and ended up getting a 404 error page for the category page.

See below:

http://dvdreleasesandnews.com/movie_type/horror-movies/

I followed the example in the 'usage' for custompress but still getting an error. Someone help please.