Help in printer sharing

I need to share a printer, so I've setup a workgroup "astagroup" on 3 computers.

Enabled "Printer Sharing" in TCP/IP only in Computer 1.

Computer 1 has Epson Stylus 640 printer [OS WinME] [Hosting Printer]
Computer 2 has Epson 2170 printer [OS WinME]
Computer 3 has Okidata 321 printer [OS WinME]

Eventually...it work flawlessly (Computer 2 & Computer 3) except that when I put a password in "Shared As" in Computer 1 printer, the Computer 2 or Computer 3 cannot now printer its document in Computer 1.

Now Computer 2 nor Computer 3 does not prompt/ask any password for Computer 1 to accept the password for it to be able to print. I've re-installed the printer & restart this 3 computer everytime I change settings. When I delete the password in "Shared As" in Computer 1...all things went back to normal.

I want to add a password so that Computer 2 & Computer 3 can only print in the Computer 1 since we had about a dozen workgroups in the Building.

Can you guys help me out??

Thank you in advance.