Hello, I'm new and I hope my English is good enough for here ^^

my problem: on my webpage I've 4 simpleviewer-galeries
- nature (158 photos, loads very fast)
- others (98 photos, loads very fast, too)
and yesterday I edited 2 (everything should be right)
- people (157, but when you're on the second site (with the thumbnails) you can nothing do anymore. you can't klick anymore.)
- architecture (56, it loads soooooooooo slow)

please help me!

thank you,
emoji