Errors de Acesso ao Servidor Linux através de estações Win

Ao tentar acessar o servidor Linux através de estações Windows XP ou 2000 estão ocorrendo os seguintes erros, o usuário não está sendo autenticado, mesmo sabendo que ele consta na listagem dos usuários do AD (através do comando wbinfo -u , estou conseguindo visualizar todos os usuários registrados na rede).:


---> getpeeername failed

---> idmap Fatal Error: UID range full!! (max: 200000)

Estou utilizando a distruição
Fedora Core 2
Samba 3.0.3
Kernel 2.6.5


smb.conf

# Global parameters
[global]
workgroup = GUIMAR
realm = GUIMAR.COM.BR
server string = Servidor de Testes
security = ADS
obey pam restrictions = Yes
password server = 192.168.1.5
pam password change = Yes
passwd program = /usr/bin/passwd %u
passwd chat = *New*UNIX*password* %n\n *ReType*new*UNIX*password* %n\n *passwd:*all*authentication*tokens*updated*successfully*
unix password sync = Yes
log file = /var/log/samba/%m.log
max log size = 0
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
dns proxy = No
idmap uid = 10000-20000
idmap gid = 10000-20000
winbind cache time = 15
winbind use default domain = Yes
hosts allow = 192.168.1., 127.

[printers]
comment = All Printers
path = /var/spool/samba
printable = Yes
browseable = No

[A4-Color-I]
comment = A4-Color-I
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Color-I
use client driver = Yes

[A4-Mono]
comment = A4-Mono
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Mono
use client driver = Yes

[A4-Mono-Frente-Verso]
comment = A4-Mono-Frente-Verso
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Mono-Frente-Verso
use client driver = Yes

[A4-Color-II]
comment = A4-Color-II
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Color-II
use client driver = Yes

[Impressora-PDF]
comment = Impressora PDF
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = Impressora-PDF
use client driver = Yes

[A4-Color-Comercial]
comment = A4-Color-Comercial
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Color-Comercial
use client driver = Yes

[A4-Mono-Financeiro]
comment = A4-Mono-Financeiro
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Mono-Financeiro
use client driver = Yes

[A4-Mono-DP]
comment = A4-Mono-DP
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A4-Mono-DP
use client driver = Yes

[A3-Color]
comment = A3-Color
path = /var/spool/samba
guest ok = Yes
printable = Yes
printer name = A3-Color
use client driver = Yes