service pack 2的問題

Please try to download the latest and the best MSN messenger from
Microsoft, it should have all the extra plugin come with that will support SP2.
Hope it help la.
good luck
http://www.microsoft.com/downloads/details.aspx?FamilyID=d78f2ff1-79ea-4066-8ba0-ddbed94864fc&DisplayLang=en
PS : if new messenger install does not work, there must be some settings in your WINDOWS SP2 Firewall you need to touch. I will just disable that FIREWALL !and use ZoneAlarm instead. :)