Norton not updating

Hi I was just using the new PC as always for a few months every thing was fine then in Augusts some time the Norton stop talking to its server. That includes the Norton NBRT- retail downloader, talked to a guy in some other country to no avail he seem to think my internet provider was at fault, didn't instill a lot of confidence in Norton. The system time is fine. Today is 10/7/2012 11:49 am by the clock.