Actually, I would start with TechNet Article ID: Q216734, which tells you how to set up a network time server. This error is telling you that the w32time service is not configured with a network time server.
Time sync is very big in Windows 2000 (a 5-minute difference in system clocks will prevent Kerberos authentication!).
So, if your server is not set up to sync its clock with something, you will get this error.
If you have multiple servers, you can set them all to pull of a centralized server, and this central server can be set to pull the time off the Internet.
Here is the URL for the article that tells you how to do this (it's easy!):
http://support.microsoft.com/support/kb/articles/Q216/7/34.ASP
(please remove any spaces)Hope this helps.