Archive per category

Hi,

I’m having issues setting up archives for each of my categories. I have a working archive file, it works fine for links like: ./index.php/2010/

I also created a specific archive template that displays only posts from certain categories [basically a copy/paste from the base archive file but with a filter]. My problem is that I have been unable to get it to work on a Page. The new page uses the category archive template but instead of showing the posts themselves it just shows the title to the Page.

Links:
Working: http://www.abuenpaso.cr/index.php/2010/07/
Not working: http://www.abuenpaso.cr/index.php/archivo-de-noticias/

Basically what I want to do is have a page that displays the archive to each category.