Domain User has no privelages

Hey Geeks,

I have a customer, who got a new WinXP Pro machine.

They log onto a domain to connect to resources and such.

However, this one user can join a domain locally ("THIS COMPUTER)), and access all the necessary resources, but when he logs on as a domain user ("XXXXX.COM") from that pull down menu, he has no privelages at all.

He cannot access any servers, install software, nothing. I do have access to the domain controller and have even tried giving him Administrator rights, nothing changes.

Anyone know Active Directory and Domain rights very well?

The kicker is that there is another user who also got a new system, same exact type, she can log onto the domain with out any problems.

Please help.

Thanks.....