impressora no linux

oi configurei o samba
tudo ok instalei a impressora no linux mas so
funciona se eu logar no samba com permisoes de root

Samba + Cups

[global]
workgroup = grupo
server string = grupo
os level = 33
netbios name = server
unix extensions = yes
unix password sync = yes
load printers = yes
local master = yes
domain master = yes
domain logons = yes
logon script = loga.bat
smb passwd file = /etc/samba/smbpasswd
passwd chat = *New*UNIX*password* %n *ReType*new*UNIX*password* %n *passwd:*all*authentication*tokens*updated*successfully*
printing = CUPS
printcap name = CUPS
socket options = SO_KEEPALIVE IPTOS_LOWDELAY TCP_NODELAY
wins support = yes
password server = None
[netlogon]
comment = Network Logon Service
path = /var/lib/samba/netlogon
browseable = yes
writeable = yes
create mask = 0777


[homes]
comment = Home Directories
valid users = %S
browseable = no
writeable = yes
create mask = 0640
directory mask = 0750

[printers]
comment = All Printers
path = /var/tmp
printable = yes
create mask = 0600
browseable = no:
[print$]
comment = Printer Drivers
path = /var/lib/samba/drivers
write list = @ntadmin root usuario
force group = ntadmin
create mask = 0664
directory mask = 0775

[samba]
comment = Pasta do Linux
path = /home/samba
writeable = yes
create mask = 0777
directory mask = 0777
browseable = yes
available = yes
public = yes



sendo se que o" usuario " tambem nao Funciona

smbpasswd -a usuario;
smbpasswd -e usuario;

os usuarios ja estao criando no samba
e habilitados