Having trouble to get this to work

First of all congrats on this great module. I saw it working on your demo site and thought it was incredible.
I followed all the steps you described for the installation, but i cannot get this module to work. I have a few vocabularies and items defined and I was expecting to see that work hierarchically. Other than downloading, installing and activating the module is there anything else you perhaps missed in the documentation? Maybe creating a content type of anything of that nature? I appreciate your response.

Luis