johnson,
check your firewall and McAffee and make sure that it allows the Aceshigh.exe for UDP as well. (If you installed a patch or reset the firewall, you need to reallow AH in any way, since the exe might have changed - that will have the old one apparently allowed, but not the new one).
You need to reallow AH on both firewall and AV each time you update one of the three.