Server 2003 will not join domain

I have a 2003 server that I cannot get to join a domain. It was previously on domain as a DC. It was demoted and taken off domain but now when I try to join domain as a different netbios name it will not let me. I keep getting an login error target account name is incorrect. I have run newsid and changed name etc. Hoping someone might have some ideas on how to fix this?
DaveKall42Asked:
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NVITEnd-user supportCommented:
> login error target account name is incorrect
Would this be the domain admin or equal user?
DaveKall42Author Commented:
Yes using domain admin.
Thomas GrassiSystems AdministratorCommented:
Change from domain to work group
restart computer

Rejoin domain

How are is the network adapter setup? Static or DHCP?
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DaveKall42Author Commented:
Tried that already. Didn't work.
It's setup with static IP.
Lee W, MVPTechnology and Business Process AdvisorCommented:
Post a screen shot of the error you're getting.

make sure your DNS is correct.  Try using the DNS domain name to join it to the domain.  And DELETE the old computer account from the domain - put simply it's no longer needed.

You're telling us the whole story too, right?  This wasn't a DC before or anything?
DaveKall42Author Commented:
Hmmmm, yes I am and if you look at my posting you will see  "It was previously on domain as a DC."
Thomas GrassiSystems AdministratorCommented:
Does the computer name show in the ad under users and computers?

What account you using to join the domain?

I would change it to a completely different work group name not one you used.

This will create new sid for computer.

Delete any reference of this computer in AD

Restart server make sure you can logon as administrator on the workgroup

Then rejoin to the domain.

HTH

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zalazarCommented:
Could you please check the date/time and timezone and make sure it's correct.
compdigit44Commented:
Have you tried using ntdsutil to make sure all reference to the old DC are 100% gone?
Thomas UCommented:
Try name the workgroup of the windows 2003 server the same name as the Domain, restart and try again.
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