I am running samba PDC on CentOS 5.4 64 bits machine , i have created Samba as PDC server per this linuxhomenetworking site only and my windows client machine easily joins this domain but when i logged in it shows me error roaming profile can not updatting and when i check in the log here is the errror.

[2010/01/04 16:53:32, 1] smbd/service.c:make_connection_snum(1033)
abhishek ( connect to service test4 initially as user test4 (uid=690, gid=690) (pid 8647)
[2010/01/04 16:53:32, 0] smbd/posix_acls.c:create_canon_ace_lists(1438)
create_canon_ace_lists: unable to map SID S-1-5-21-144265192-2488348622-4110138419-2380 to uid or gid.
Load smb config files from /etc/samba/smb.conf
Processing section "[printers]"
Processing section "[homes]"
Processing section "[netlogon]"
Processing section "[profiles]"
Loaded services file OK.
Server role: ROLE_DOMAIN_PDC
Press enter to see a dump of your service definitions
workgroup = EXAMPLE.COM
netbios name = SAMBADC
server string = Samba Server Version %v
interfaces = lo, eth1
add machine script = /usr/sbin/useradd -d /dev/null -g samba-clients -s /bin/false -M %u
domain logons = Yes
os level = 65
preferred master = Yes
domain master = Yes
wins support = Yes
hosts allow = 127., 192.168.16., 192.168.17.
cups options = raw

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

read only = No
create mask = 0644
browseable = No

path = /home/samba/netlogon
guest ok = Yes

path = /home/samba/profiles
read only = No
create mask = 0600
directory mask = 0700

ls -l /home/samba
total 8
drwxr-xr-x 2 root root 4096 Jan 4 12:22 netlogon
drwxr-xr-x 2 root root 4096 Jan 4 12:27 profiles