[Plugin: NextGEN Gallery] Slideshow doesn’t work, movie not loaded

Help me, please! The slideshow, provided by NextGEN and ImageRotator doesn’t work on my page now. It worked fine before, don’t know, what happened. Maybe when I upgraded the plugin, something went wrong. Now, no error, just free space, and when I rightclick on it, it says ‘Movie not loaded’. I tried to download ImageRotator again and overwrite, but no change. Thanks for your help…