Dear Greg,
Known issue, no longer a problem.
Before proceeding with your very valuable feedback, which I sincerely appreciate, the support of gigas.com found the fault (in the php of VPS) and they say:
[i] "It seems that php was having problems connecting to the server with fopen (either in or in connection DNS resolution was giving timeout).I have Changed the settings and have already patched correctly administration page." [/i]
Anyway I copied your orientation to gigas's people to join their knowledge base if similar problems occur with other customers.
With your permission, I will comment publicly this episode on my blog where I explain why I think that ATutor is the best open source LCMS though so marked tendency to prefer Moodle in Spain and Latin America (not just the talent of "Greg" ... is their tenacity to solve little problems day to day and see the great potential of ATutor in the future, I feel and I appreciate your passion more than your talent)
The problem is solved! Everything seems to be working normally (until the next fault :) )
A sincere appreciation to your attention. I want to trust that the next time you see a message request for help from "es24tv" do not turn off your PC and go running to Tierra del Fuego in the south of the continent :)
A hug,
Mario