Found the problem. I deactivated the joomla caching. Now all works fine.

Hello, we have a problem with our Admiror gallery. We uploaded some photos but we can't got to page 2 or 3. I checkt the rights and the file user but all is correct. Some ideas? We love this gallery ... Here is a sample http://ojaf.at/was-wir-machen/aktivitaeten-jugendarbeit/488-city-pool-beatz-vol-4