NT 4.0 Domain with WIN2K RAS

My network is running on NT 4.0 and I setup a Windows 2000 server on the side to test out a few things like Remote Access Server. The problem is that I can dial in with a client computer and connect to the RAS but I cant really do anything else with. Also after connect, i use IPCONFIG and find out that the client computers ip address and default gateway are the same. What could be causing this problem?