SIMGallery loading problem: large amount of pictures

Hello SIMBunch!

We installed SIMGallery and we upload more than 300 pictures in to an album at the same time.
The upload works without any error.
If (public or registered) people open the album there are only 96 pictures are loaded and the rest are not accessible (even there don't appear at all).
What could be the problem?
We use JSN-Epic Pro template if it causes the problem.

This is the concrete album:
http://teggerweb.hu/[...]album&aid=1

Thanks,
schferenc