Connect Win98/ ME PC’s to Win2K Server

Hello. I would like to know if I am doing some thing incorrectly. Our office decided to migrate to Win2k 2000 SP1. New server never networked. Previous network was peer-to-peer using Win98. It installed fine. Active Directory setup users, andshared files with no problems. When I try to connect ME computers to the network, it gives an error of invalid login.

I am using the preferred login of \\Domain\UserName. I also tried username@domain.com ( examples) plus the password and domain name in MS Networking. I have TCP/IP protocols, plus IPX listed.

Any insight to this is greatly appreciated.