Problem with navigation page

Hello

I've the wphotel theme, but i can't find where i can fix the number of posts by page !

if i use worpdress usual menu to do that (admin / reading options / number of post by page) it's don't work...

wphotel put me a trasnversal bar between posts, but not add more page... all articles are in the same page ...

strange !
do you have an idea ?

please, an admin could answer me ?