Sites does not show up in category pages after assigned to cats

I have bought the Site Category. But i am having some problems using it. I have put the categories at the home page. And assigned a site to one of the categories. It show that it is there "Musicians(1)". But when i click on it it takes me to a 404. I have also tried putting "bcat" before the cat title. Nothing works. So can you have a look and tell me what's wrong?