Can't promote server to a domain controller

From: Miha (miha.bernik_at_email.si)
Date: 10/17/05 

Date: Mon, 17 Oct 2005 17:25:20 +0200

Hi

We have a Win2003 mixed mode domain, with two Win2003 and one Win2000
Standard Domain Servers.

After promoting a new Win2003 Standard server to a DC, during configuration
of active directory wizard, we got the following error:

The operation failed because: The Active Directory Installation Wizard was
unable to convert the computer account COMPUTER_NAME$ to a domain controller
account. "Access is denied."

Looking in AD site and services, a new server name is actually created (only
name) but without any additional parameters.

Default domain and controller policy is used with default settings. I really
don't have a clue what could be wrong?

Any help will be appreciated

Thank you all in advance

Regards

Miha