it's really strange kusco. It works fine to me, too. To solve this problem you can try to access to the webserver url: http://treebytes.tr.funpic.de/easy3dfa/
Yepp, it's an advertisement placed by my webhoster in exchange of a free virtual webserver. I searched for some paid webhosting offers, but they are just too expensive for me.
Sorry about that but you can simply close the window by clicking on the X. Or try to install Mozilla Firefox and the AdBlock Plus addon.
Although it's very strange that the advertisement does not load into the layerAd. I will try to get information about this problem from my webhoster.