First of all, machine
Server: Windows server 2003 sp2 Domain controller with active directory, dhcp server, dns server .
Clients : One is XP SP3 and one is win7.
There's the story. Server crash (motherboard died) so build new one on a rush. Got some problems but evertything seems now to be quite ok. This server run a c# app witch use ldap to get the group the users is in.
My only real problem is : With those 2 machine, it's impossible to log on. It tell me that the user or password is wrong. There is +- 30 machines (win7 and XP) who logged all day long without problems and on any of those who work, the user and password work perfectly.
I just dont understand why those machine wont connect. I'm not a network guy, i'm a programmer who is taking care of everything (like alot of people i guess) so my knowledge in this kind of problem is not that good.
Thanks for your help
EDIT: I forgot to mention those 2 computers communicate over vpn and are not on the same subnet.