Windows NT Service Pack 3 began writing the full UNC (Universal Naming Convention) name of the printer in the registry. When you change the name of the server, Windows NT does not update the registry and the printer shares no longer appear. Edit:

HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\SERVICES\LANMANSERVER\SHARES

Double-click each of the printers listed under the Shares key to open the Data dialog box and update the Path= to reflect the new UNC name of the server.