Great, thanks. Im glad it was just my tiny but very important mistake.
Since this works, it messes up my style. All my design settings are broken. Like black background and different fonts.
I can set it up from scratch again, but I guess there is an easier solution.
Am I missing something here?
One more thing I have found:
Im not sure whether this was done on purpose.
I have to subcategories on one parent.
Each category has one article. On the main Knowledgebase site I can see all three articles being displayed under the parent category. Opening the parent category I see two subcategories containing each of their articles. The parent one does not have anything, and all of the articles are displayed below once again.
Here is what it looks like: http://i.imgur.com/VC6Steq.png
I guess the subcategorized articles shouldnt be seen unless you open the parent one, and make the subcategories visible.
Thank you