That's good news
It seems that SP2 still have problems with some programs.
Try to disable the buit in Windows Firewall
Right-click
My Network Places,
Properties, right-click your connection,
properties,
Advanced,
Settings, and check
OFF for the firewall.
If this didn't solve the problem, you'll need to wait till Microsoft release an update that might solve this problem.
(by the way, the built in Sp2 Firewall is not bad)
Another solution is to uninstall SP2 and live with SP1