Adding PCs To Domain - Error

From: Brian Gentile (BrianGentile@hotmail.com)
Date: 09/26/02 

From: "Brian Gentile" <BrianGentile@hotmail.com>
Date: Thu, 26 Sep 2002 06:14:13 -0700

Hello,
I have been getting the following error out of the blue:

"Your computer could not be joined to the domain. You have
exceeded the maximum number of computer accounts you are
allowed to create in this domain."

I have no idea where in my account that number is set.
Can anyone help?

It is a Windows 2000 Domain with Active Directory.

Thanks in advance