Merry Christmas, avahilario!
The problem with the World Community Grid BOINC server is explained in 'Known Issues': http://www.worldcommunitygrid.org/forums/wcg/viewthread?thread=10703

Lawrence

I too have 1 UD agent still running so work is still progressing, albeit slowly. I feel like a fool, however, for converting almost all-1 of my UD's clients over to BOINC a few weeks ago, but _not_ keeping my UD install folders, especially the CS.UD configuration file. That way I could switch between BOINC and UD, and still have the machine registered both ways, in the event that either agent/server was having troubles. Having both available would be invaluable, and not too difficult to achieve.