Trouble with new user

[J Horacio MG <homega@vlc.servicom.es>]

In an attempt to create a new user, with useradd command, the new user's
home directory was created, and so was the line in /etc/passwd:

usermaria:x:1001:100::/home/usermaria:/bin/bash

But if I try to log in as such user:

login: usermaria
Password: xxxxxxx
Login incorrect

What may I have done wrong?

Also, strangely, I have a file in the /etc directory named góoup-.  This
file I believe it's a copy of the file group, see:

1 -rw-r--r--   1 root     root          567 jul 14 18:50 group
1 -rw-------   1 root     root          560 jul 14 18:49 group-
1 -rw-------   1 root     root          504 may 21 11:36 góoup-

The new user doesn't show in the group file (it should, at least in its
own group, right?).

TIA
-- 
Horacio
homega@vlc.servicom.es
Valencia - ESPAÑA