River activity not showing

Hello everybody, my name is Arturo, im from Argentina and this is my first post here.
I have been a long time Elgg user, near 3 years, and i always have found answers to my questions on the community.
Recently, i was developing a new site on WAMP. Everything went allright, and site looks like this.


I moved this site to a hosting, where i have another elgg sites running perfectly. I followed steps as described in here http://docs.elgg.org/wiki/Duplicate_Installation

When i go to the real site, the internet site, located on www.preparame.com.ar i get this:



Activity does not show. No matter if there i am logged in or not, i checked all configurations, and i found nothing.
Can you help me with this? Any idea?