blog sidebar on category-page

hey,

first of all, my page: http://www.feedthegeek.de.
in my blue menu-bar, there are the points “blog”, “news”, “reviews” and “crew”. these are category-pages. it means, on settings>menu, ive choose categories for the menupoints, not pages. i have some problems with the pagebuilder, so i must do it so.
i dont know why the category-pages dont show my widgets or my whole blog-sidebar. is there a css-code for this? i want my widgets shown on the right side here; http://www.feedthegeek.de/category/news/

and is there another way, without pagebuilder, to show my ticker in a category page?

greetings and thanks in advance