please help – cloud stays empty

Hello,

I’m Mike from the Netherlands, I installed ultimate tag cloud and activated it.
Placed it in the widgets in a right column.
I can see the main title but the cloud stays empty.
I want to have the title’s of my “pages” in the cloud but I can’t figure out how to do that. (or the titles of the main menu would also bo good)
Probably I’m doing something wrong.
Link to the empty cloud…

http://www.venusendewaard.com/VW/index.php/about/historie/

Does somebody have a suggestion?

regards,
Mike

http://ww.wp.xz.cn/plugins/ultimate-tag-cloud-widget/