I helped myself using screenshots on your site ( and it shouldn't be that hard to setup )
I choose the categories, i choose the articles to include.. but nothing is showing in my page.. even the tab shows itself like if it's collapsed.
I really need some help!

Dear btcitsol

Did you read our userguide to configure this? Please refer our userguide here www.smartaddons.com/news/extension-user-guides/yt-ajax-tabs-userguide.html

Thanks