Falbum/Flickr doesnt show large pics

hy
i my page https://www.clausinisland.de i show pics via falbum from flickr.
this worked fine till yesterday.
i created a new set (01. und 02.03.2007):
https://www.clausinisland.de/wp-content/plugins/falbum/wp/album.php?album=72157594566189478
click in a thumb and you will see only a flickr-image.
the set before (created some days ago):
https://www.clausinisland.de/wp-content/plugins/falbum/wp/album.php?album=72157594560685668
works fine with lage images.
i changed nothing in the code. all permissions set to public.
i dont know what to do. any ideas?
thank you
claus