[Samba] unable to connect to KDC Server

I'm trying to connect my FreeBSD 6.2 machine to Windows 2008 Server AD.
this is what I get.

rock# kinit Administrator
Administrator@LAB.NET's Password:
kinit: NOTICE: ticket renewable lifetime is 1 week
rock# klist
Credentials cache: FILE:/tmp/krb5cc_0
Principal: Administrator@LAB.NET

Issued Expires Principal
Jun 3 11:19:44 Jun 3 21:19:44 krbtgt/LAB.NET@LAB.NET
rock# net ads join -U Administrator
Administrator's password:
[2008/06/03 11:20:01, 0] utils/net_ads.c:ads_startup(281)
ads_connect: Server not found in Kerberos database
rock#

*****my krb5.conf***********
[libdefaults]
default_realm = lab.net
clockskew = 300
v4_instance_resolve = false
v4_name_convert = {
host = {
rcmd = host
ftp = ftp
}
plain = {
something = something-else
}
}

[realms]
SAFAD.LAB.NET = {
kdc = SAFAD.LAB.NET
}
SAFAD.LAB.NET = {
v4_instance_convert = {
kerberos = kerberos
computer = SAFAD.LAB.NET
}
}
[domain_realm]
.lab.net = LAB.NET
[kdc]
profile = /usr/src/crypto/heimdal/krb5.conf


***********my smb.conf ***********
[global]
workgroup = LAB
realm = LAB.NET
server string = SambaServer
security = ADS
password server = SAFAD.LAB.NET ####*
guest account = pcguest
use kerberos keytab = Yes
log file = /var/log/samba/log.%m
max log size = 50
socket options = SO_RCVBUF=8192 SO_SNDBUF=8192
printcap name = lpstat
os level = 33
local master = No
domain master = No
dns proxy = No
wins server = SAFAD.LAB.NET
idmap uid = 1000-29999
idmap gid = 1000-29999
winbind separator = /
winbind enum users = Yes
winbind enum groups = Yes
winbind use default domain = Yes
hosts allow = 192.168.124., 192.168.1., 127.

Thanks in advance,
Augustin.


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