My list of articles in categoriy or archive not showing

Dear friend, theme is great, liket it that much I choose it for my blog, but today I have noticed that suddenly if I click on a link of category or archive it doesnt show anything, just a header with empty page (blank – white). I installed another theme to test it, and with other themes it works well, but with target it doesn’t. You can see on this link how it looks like http://www.beogradskisan.com/category/beogradski-san/.

Quick help would be appreciated.