Kerberos event id 7

[solarys]

Help Please!!

Can somebody tell me what is causing this error?

Event Type: Error
Event Source: Kerberos
Event Category: None
Event ID: 7
Date: 4/22/2002
Time: 3:55:58 PM
User: N/A
Computer: BLAYR
Description:
The kerberos subsystem encountered a PAC verification failure. This indicates that the PAC from the client BLAYR$ in realm BLAYRNET.LOCAL had a PAC which failed to verify or was modified. Contact your system administrator.

For more information, see Help and Support Center at

http://go.microsoft.com/fwlink/events.asp.

Data:
0000: 92 01 00 c0 ’..À

Any/all suggestions are welcomed.