Category Linking

Hello.

In my theme (http://www.thehowellsnest.com) how do i get a link to point to a certain category? I have my permalink structure that looks like (/%category%/%postname%) however when i point my browser to http://www.thehowellsnest.com/category/jrock-series or http://www.thehowellsnest.com/jrock-series it just takes me back to the homepage and not to the category itself.

Bit stuck on this one.

Cheers
Rich