unsuccessful domain controller demotion

Hi, i am getting the following error while demoting a windows 2003 domain controller. Our environment consists of 2 Win2008R2 DC, 2 Win2003R2 DC and 1 Win2003 DC. All FSMO roles are on one of the Win2008R2 DC. All are Global Catalogs. When i try to demote the Win2003 DC, the following error occurs:

The operation failed because: Active Directory could not configure the computer account xxxx02$ on the remote domain controller xxxx.xxxxx.local.  "Access is denied."

Have followed the steps in the following MS article and no luck: http://support.microsoft.com/kb/2000939

Please help.

regards,

kishore.ch