Ultimate Warriror Tag Problem

I am using the Ultimate Warrior Tag plug in to organize and display my tags. I have set up a tag archive to display a tag cloud and have tagged over 150 posts but when I click on a tag under a post I go to a page which is in this format:
http://208.109.173.184/index.php?tag=free_workshop
The tag title is at the top of the page but it also says:
<<Not Found
Sorry, but you are looking for something that isn’t here.>>

Does anyone have any idea how to get the posts associated with a particular tag to display?
Thanks