Q&A plugin /questions/ page not showing

I've followed the instructions given for this plugin, but the site is not showing me the page.
I've even created a question from the back end and published it, but it's also not displaying, when I View from the post itself.
I even tried creating a Questions page, similar to what is done for the Blog page when it's not the home page.
A slight but obviously crucial step is missing from the instructions?