My b2evolution Version: 2.2.0

When I try to click on any category on my newly installed blog, it never swiches over to that category as you would expect, it just stays on the same web page pending as if it is about to go to the category but it never does. The server does it with all of the demo blogs (Blog A & B ) that comes with the install and any that I create.

When I go to the Dashboard->Posts/Comments section and do a search on the posts via Category it works fine, I get only the posts listed in the category I searched for, but running on the blog it never displays the posts via category. It just keeps on pending.

Is there a setup tweak I'm missing? Has anybody come across this before? Are there logs that I can check for errors on B2evolution sever?
Thanks