Ajax Photoalbum problem with scrolling

I have installed the photoalbum. But somehow the scrolling arrows jsut below the picture don't seem to work. They do not react to my mouse.
You can see it with this link:
www.yourvirtualdisplay.nl/idoubleyou/ind...&view=article&id=8#1
What can be the problem?

Thanks,
Nienke

Have you tried with the default template?

Yes, it doesn't work with the template immediately after installation.

In which template is this described in the HTML?

Nienke