UTW shows no results

I recently installed UTW on my blog. I have permalinks and tag rewritting enabled. If I try to view posts by tags, I get “Sorry, no posts matched your criteria.”. I have tried every combination of permalinks and tag settings but still no thing.

With the exception of this, UTW seems to be working properly, eg. I get the tag cloud showing. I tried posting this on the UTW support forum, but no one answered and now the forum is down.

Any help would be much appreciated.