I installed and activated the Q&A plugin. I changed permalinks from "default" to "post name". I even changed my theme to twenty twelve. But when I try to navigate to the questions panel, I get dropped instead onto the Wordpress sample page.
As an admin, I click on the sidebar "questions" tab and choose "add new". I get an "Add New Question" panel (site/wp-admin/post-new.php?post_type=question), type a title and a question, and click the "Publish" button. Feedback at the top of the page says "Post published", with a link to "View Post". I click that link, and end up at site/questions/question, which is (aside from some navigational widgets) blank - only one post, "Hello World".
This is a new Wordpress install, followed by a new Q&A install. I'm evaluating products for a new website.