The WikiView control should be in List or Master mode. If the control is in Details mode you will not see anything. Generally Details mode shows only one item. If you have 10 tagged items they should be displayed on list mode, because the purpose on TagList control is just to filter all items that belongs to a given tag rather that redirect to certain content item. As you see in the QueryString the Tag ID is passed, not the content item ID.
Let me know if there are additional questions or something that you think that may work for you so we will try to come up with a solution and guidance. I look forward to hearing from you.
the Telerik team