[Plugin: NextGEN Gallery] please wait / bitte warten

Hi

works fine so far (got it perfectly working on other sites (same server)

But I’m having a hard time with a current installation (latest version of nextgen, and wp).
The thunbs show up, and it works perfectly fine with pictlens, but when I just click on a picture, I get a greyed out background with “Bitte Warten” (should be “please wait”) in red letters and nothing happens from that point

Any help is highly appreciated.

PS: doublechecked the settings to other know working sites and they are the same. Installed the imagerotator.swf as well)

Thanks a lot in advance

Andre