Upgrade from Pro to Internet Security slows NNTP

I had Pro for a year and was getting 12MB+ download speeds from an NNTP server. The software, NNTP, internet provider has not changed. What I did 2-3 days ago was purchase and upgrade to Internet Security. Now I am getting 4-5MB download speeds.

I have excluded NNTP traffic from scanning, it was actually set before also. I have added my NNTP server to my friends.

Any other ideas?

Roger