I'm running ZASS 6.5.737.000 and MSN Live Messenger 8.1.0106.00 (v8.1 Beta).
I was having the connection issue that seems to be prevalent for many folks.
I was doing the "shutdown ZASS, logon to Messenger, start ZASS" routine.
It worked but it was annoying.
Last night my son logged on to the PC, ZASS running of course, and logged on to Messenger with no problem.
Subsequently, I tried the same thing, and it worked for me.
I guess someone fixed it, unless the gnomes and pixies inside my box did it themselves.

Operating System:Windows XP Pro
Product Name:ZoneAlarm Internet Security Suite
Software Version:6.5