Form Element Doesn't Display on Node

Hello,

I am trying to set up a way for students to find an appropriate test-preparation course from the various options on a website. The end result should work like http://www.geminicourses.com/book-now, which I found though this post.

I have set up a taxonomy and activated HS, and admin/logs/status shows everything is configured correctly.... However, on the node I've created, I can't get the form element to show up. I've tried everything I can think of, including pasting in the code at http://wimleers.com/demo/hierarchical-select/taxonomy (under "Show conifg" for "My car").

With no tutorials and scant documentation, a relative newbie like myself is unfortunately easily thwarted. I have looked thoroughly through the Issues/Support Requests and searched on Drupal.org (plus Google), but am not finding anything to help.

Therefore, I would really appreciate any assistance in creating a basic working setup! I'm sure it will help others like me too down the road....

Jim