samba - Aug 2003 - how to find out who regsiter the wins entry..

hi:
  we have two samba servers, s1 & s2. s1 act as wins server.
  and we can not access s2 today,
  because another computer also named s2 register the name into s1's
  wins database, with a strange ip "192.168.254.1" (we use
192.168.2.0/24
here).
  i think the stranger "s2" must have another ip 192.168.2.X to
connect to
server S1,
  but how can we find out the real ip of the stranger? maybe set the log
level?
  thanks for advice!!

Regards,
tbsky