Windows Messenger 5.0.0482 peer-to-peer IM not working

[vagrawal]

Hello,

Does someone know if the registry key to lower the
HKLM\Software\Policies\Microsoft\Messenger\Client\ {83D4679F-B6D7-11D2-BF36-00C04FB90A03}\_Default\EnableSIPHighSecurityMode
has changed. If I run 5.0.0468 with this registry key set to lowest
security (0) peer IMing works ok. But, when 5.0.0482 is installed and
same registry setting is used, peer IMing doesn't work.

Thanks.
Vishal