Overlay image not displayed

Hi,

When I try to view the image as overlay. Well going all the way to the final gallery location and then clicking on the image, I get a popup/overlay, but the overlay is empty…

I have testes, FF, Chrome and IE9, all no luck:

Have a look here:
http://www.gischig.com/wordpress/?p=19&albumid=359

Please let me know if I would need to add an other plugin or how to get this working.

Cheers and many thanks for the best Gallery3 plugin…

roman

http://wordpress.org/extend/plugins/wp-gallery3/