The server IP Address in Pharos Administrator does not match the IP Address of the server's network card. To fix this:
1. Run Ipconfig from a DOS command prompt to find your current IP Address.
2. Open Pharos Administrator.
3. Scroll down to System and select Servers.
4. Change the IP Address to the current IP Address assigned to the Nic card.
5. Click on Change Control.
The Signup Clients should pick up the correct settings and the users should be able to log on.