Laser Jet 4100 Printer sharing – Windows

I have a Windows 2000 client PC with a Laserjet 4100 printer installed on this PC. We want to use this printer as a network printer. I’ve right clicked on the printer and went to sharing and shared the printer as a certain name. When I go to one ofthe other clients PC’s to install the printer, when I click to select this printer it’s asking me for a username and password. What can I do so that we can use this as a network printer? Thank you.