GSgallery 2.0 - Simple Image Gallery Plugin (Square It)

[Connie]

Connie,
I quickly checked and it's a conflict of CSS with the template you are using.
I removed this:
<link href="http://www.urbanistan.de/getsimple/theme/canvass/style.css" rel="stylesheet" type="text/css" media="screen" />
and the gallery worked fine, of course it removed all styling of your website, but maybe you can get support from the place you got the theme from.

I got it and I fixed it.
I downloaded the actual version of Fancybox (1.3.4) and as I did not want to edit your files, I just renamed them "back" to 1.3.1 and the problem is gone!

So I suggest for further versions to use fancybox 1.3.4

I am happy now