[Plugin: Ultimate CMS] How to activate permalinks for custom post type ?

Hi,

I’d like to customize the permalink structure of my custom posts type.
I found it had to be rewritten but when I try to change the Permalink_EPMASK field, it doesn’t work at all.
And I can’t find any example nor if there’s something more to do…
Thanks for any help.

http://wordpress.org/extend/plugins/ultimate-cms/