Dial Up Networking doesn’t logon

I have a network with 2 NT4 servers, a PDC and a BDC. Dial up networking is installed on the BDC (named ntserver). Users are able to dial in, and execute the script file which should yield connection to both servers (on same subnet(one static IP address away), however only connections to the BDC are available. Any idea why users cannot logon to the PDC (named W2K-server)?? Internal LAN users have no problem.