hi guys thanks for the help...
I have also posted in
http://www.microsoft.com/windowsxp/expertzone/newsgroups/reader.mspx
with subject
WM 4.7 under XP SP2 don't support SIP
but no luck till now.
have tried reinstalling Windows Messenger 4.7.2009 on a XP SP2 system, but it doesn't work (note: i am not interested in MSN, just SIP services), have also install add on for 4.7.2009
but no luck either.
when i uninstall SP2, Windows Messenger 4.7.2009 works just fine with SIP services.
!!! SO !!! stuck because I cannot use Windows Messenger 4.7.2009 on XP SP2,
thanks