Updated to latest version of iTunes and am trying to set up an ATV2. When I try to activate Home Sharing in iTunes I get the following error message, "Home Sharing could not be activated because an error occurred (-3259). Any ideas what this is before I give up and return the ATV2 for good. Tried reboot, reinstall, etc, etc and have run out of ideas. This has been going on for weeks now. Thought it was the refurb unit I bought and exchanged it for factory one. Thanks in advance for feedback.