Cant Login to domain. Urgent!

Archived from groups: microsoft.public.win2000.security (More info?)

Hi there,

I have to 3 DC have given trust to the main domain controller. 2 of the DC
manage to log in to thier own domain via the main domain controller. but the
third DC will not able to log in .
Error"The system could not log you on. Make sure your username and domain
are correct, then type your password again."
I Have check the administrator password all is perfectly.
At the w2k domain controller error msg:
Event Type: Success Audit
Event Source: Security
Event Category: Logon/Logoff
Event ID: 528
Date: 16/09/2005
Time: 11:46:56
User: FCM\waiho
Computer: HEDGECONNECT03
Description:
Successful Logon:
User Name: waiho
Domain: FCM
Logon ID: (0x0,0xDEDFF0)
Logon Type: 2
Logon Process: Advapi
Authentication Package: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Workstation Name: HC03


Event Type: Failure Audit
Event Source: Security
Event Category: Logon/Logoff
Event ID: 529
Date: 16/09/2005
Time: 11:46:56
User: NT AUTHORITY\SYSTEM
Computer: HEDGECONNECT03
Description:
Logon Failure:
Reason: Unknown user name or bad password
User Name: waiho
Domain: HC
Logon Type: 2
Logon Process: User32
Authentication Package: Negotiate
Workstation Name: HC03

3 DC is Windows 2003. The domain controller is w2k.