Active Directory 2012 DC in a 2003 domain

I have followed the wizard on how to sett up my first 2012 server as a DC in a 2003 domain. It looks ok when I upgrade it to a dc, but after it have finished and booting I try to log in, but then it is just a black screen and there it stands forever. I did manage to make a new domain user and then log in one time, but the second time the black screen is back. I did mange to demote it. After I have done that, the server are working fine. I have tested this 2-3 times and got same result. I have also re-installed the server, but the same thing happen. There is just one DC in this domain and that is a 2003 server

I do get some Event ID: 675:

Pre-authentication failed:
 User Name:SERVERNAME$
 User ID:DOMAIN\"SERVER NAME"$
 Service Name:krbtgt/Domain.no
 Pre-Authentication Type:0x0
 Failure Code:0x19
 Client Address:IP ADDRESS to DC

 

Pre-authentication failed:
 User Name:dc admin username
 User ID:"domain\dc adminusername
 Service Name:krbtgt/DOMAIN
 Pre-Authentication Type:0x0
 Failure Code:0x19
 Client Address:"server address

 but this the only error I can find.. Have someone else experienced this?