outlook buttons greyed out

i have windows 7 64 bit; outlook 2010 version 14.0.6; Norton Internet Security valid till May 2013. i have changed no settings recently that i am aware of either for Outlook, Windows or Norton. however all four Norton spam buttons are greyed out on Outlook.

i have uninstalled and reinstalled Norton Internet Security. The buttons are there on the ribbon but greyed out. there is a "Norton Antispam" folder - empty of course.