can't connect to apple update server

Sorry if this has been answered before, tried looking through threads and didn’t see anything.  I have an tav 2 that was previously jb’d.  I have updated the tav software to the latest version at a friends house.  When I am at my house the jb seems to be working normally but then aborts when it restores in iTunes.  Says can’t connect to apple update server.  How do i correct this? latest version of atv, lion 10.7.3, iTunes 10.6.1