Why Vista Machine cannot logon to Server 2008 Domain?

Don't know what happen to my server 2008.
Network setup Detail:
One 2008 Server 64 bit(trial), one 2003 server 64bit(Full) on the same server but on different harddrive,
2 Vista and 1 XP  test machine on a network with a 5 ports switch.
Server Functions on 2003&2008: DHCP, DNS, AD, Window Deployment Service.

First time with 2008: workstations can't connect to the domain. (connection is fine, I can ping the server)  Failed

Then Second time I try it with 2003: Everything is working... so I managed to logon to our domain pcking.local. Domain profile created on local machine.

Third time with 2008: I use the existing profile and managed to logon to the server 2008 domain. However there are no update on DNS records...   Then I logout and login to the local administrator account on one of the workstations(vista), and try to change my computer name and update it to the domain.  It failed to do this.

Is there anyone having this kind of problem??



2 Vista workstation has already joined the domain pcking.local on server 2003.

Everything is fine with the exact settings on server 2003 64bit.