fatal error: memory exhausted

It can also be a problem with your hoster. I had the same problem with an old 1&1-hosting-package with only 32MB Memory. With many plugins some day there was the same problem.

By the way: your website ist with 773kB a little heavy and slow.

Do you have still the mistake, when you deactivate “fancy-box”?

See the link I posted above.

@esemi: That does not help in every case, it depends on the hosing agency