Easyblog - Categories Module

Hello, i have an issue with Easyblog - Categories Module. As soon, as i have more than two nested categories and the Layout type is the first option with expandible menus, i got a white site with a litle rest of my categories in left upper corner. You can take a look: http://www.gedankentanke.de/eb-haupt-2

Please advice how to get this working the right way. Thank you and best regards, Macjoomla