I created a category "Blog" and a page named "Blog". I post articles in this category and select this category content via my Menu "Blog". But when i Click on one of my articles here : http://www.darantasia.fr/category/blog/ the page I get is empty. What do i do wrong?
Looks like it's working. If you want to create a proper blog, please see the documentation for setting that up. You just created a blog category on this current page.