You have to put [cft]-shortcode to your post, when viewed, it is replaced by cft-template-code from “Admin Dashboard/Settings/Custom Field Template/[cft] and [cftsearch] Shortcode Format”.
I installed NAVT v1.0.27 to my wordpress 2.7.1 on /wordpress/-installation directory. It did not work first at all (no response in editor), but thanks to Nekomukuro‘s fix, it’s working just fine! ??