If you just can't live without MSN Messenger BETA 7, even when you're working on Windows 2003 Server, then you'll probably receive a 80072f19 error when you try to login lately. This error will occur after you've patched your Internet Explorer 6.0 SP1 with the latest February 2005 security fixes.

This is the suggested solution:

1) Start Internet Explorer and select Menu > Tools > Internet Options > Advanced.

2) Under the Security Section, clear the "Check for server certificate revocation (requires restart)" check box.

3) Start MSN Messenger BETA 7 again and you'll have to issue your Passport account information again. You'll receive one more error. Login again and it will work!

Note: Previously, MSN Messenger v6.x would not recognize your UPnP Router, now BETA 7 can.

[Source: Yin's Limited]