zareia on "Pagination is not working"

Hi,

Paginataion is not working. When I chose page 2 the only thing that chage is url
from
http://sentidopsicologia.com/blog/
to
http://sentidopsicologia.com/blog/page/2/

But nothing else happen.

I've tried with two plugins: WP-PageNavi and WP-Pagination.
The result is exactly the same, it's not working.

Then I tried changing the theme. Pagination works properly with twenty twelve.

So I think there is something wrong with my theme.
Any idea about where to look for the error?