Problem NIS2010 blocking OpenDNS

I did not have this problem with the 2009 version. After I upgraded to 2010 it started. I use OpenDNS for my DNS server and it now gets blocked as a intrusion attempt (Portscan). 208.67.220.220 (OpenDNS primary server) UDP, port53. I have tried to allow it by making a General rule, but this has not worked. It’s not a huge deal as OpenDNS does work, but if a page times out, or has a error loading , etc. the OpenDNS page telling me what has occurred does not display( I get the sites error message instead) because it is being blocked. Not a huge deal but annoying because it worked before I upgraded and I just want it(OpenDNS) to work the way it was intended. Any help or advice with this would be greatly appreciated.