I changed the URL to https (from http) on admin/setting. Right after that the site become without header and now I have no access to admin panel. I'm trying to make a recovery from a previous date but it is imposible. I found an error indicating that wp-content/includes/index Ln 97 function "(something _ header function") not found...or something similar.
Any solution for this? I think I lost also host communication after change the url to https.
Thanks you all for help on this. You can see the error on http://www.freevacationsnetwork.com