CVS and system user problem

[Clevo]

Hello,

I want to make CVS users on my system. (I mean I don't want to make a lot of 
system user. I want only user/passwords for CVS)
The documentation says that I need to edit the passwd file.

I have a user bali, who is a system user and I can access CVS with:
cvs -d :pserver:address@hidden:/cvs login

I made some additional CVS user in passwd file but if I want login (cvs -d 
:pserver:address@hidden:/cvs login) I get an error:
Fatal error, aborting.
demouser2: no such user

I can login only with user: bali

My passwd file is:
bali:gJ.5glyEcZfdo:bali
demouser2:vO3TpoYPk3sKQ:bali
demouser:LpzDDwK31SI/o:root

What can I do? Do I have to setup some other files too?

Thanks!