[Samba] trouble with chown and samba

[Nicolas Jungers]

I cannot change owner and group of a directory or a file on a samba 
server.  I tried with a win client and smbclient.

Both the server and the smbclient are stock Ubuntu lucid amd64 servers

smbd -V
Version 3.4.7


Here are the relevant config:

#-----------------------  smbconf
#------------------
[global]
	server string = %h server (Samba, Ubuntu)
	map to guest = Bad User
	obey pam restrictions = Yes
	pam password change = Yes
	passwd program = /usr/bin/passwd %u
	passwd chat = *Enter\snew\s*\spassword:* %n\n 
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
	unix password sync = Yes
	syslog = 0
	log file = /var/log/samba/log.%m
	max log size = 1000
	dns proxy = No
	usershare allow guests = Yes
	panic action = /usr/share/samba/panic-action %d
	acl check permissions = No
	force create mode = 0660
	force directory mode = 0770

[common]
	path = /srv/samba/common
	read only = No



#-----------------------  /etc/passwd
#------------------
usercommon1:x:1004:1004:,,,:/srv/samba/common:/bin/bash
common:x:2033:2034:,,,:/srv/samba/common/:/bin/bash



#-----------------------  /var/lib/samba/passdb.tdb
#------------------
common:2033:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:58D0B7426D3D476339F7411C6EEBBC3B:[U 
          ]:LCT-4C7C09ED:
usercommon1:1004:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:7D7300E0DEF9143D4AC33EF8FAF9EF86:[U 
          ]:LCT-4C3B20E0:



#-----------------------  ll -d /srv/samba/common/ and test/
#------------------
drwxr-xr-x 12 usercommon1 usercommon1 4096 2010-08-31 21:54 
/srv/samba/common/
drwxrwxrwx 2 common common 4096 2010-08-31 21:54 /srv/samba/common/test/



#-----------------------  Now, doing
#------------------
nicolas at i27:~$ smbclient -U usercommon1 \\\\server\\common passwd
smb: \> stat test
File: \test
Size: 0           	Blocks: 0	directory
Inode: 7471243	Links: 2
Access: (0777/drwxrwxrwx)	Uid: 2033	Gid: 2034
Access: 2010-08-31 22:16:37 +0200
Modify: 2010-08-31 21:54:34 +0200
Change: 2010-08-31 22:16:17 +0200
smb: \> chown 1004 1004 test
NT_STATUS_ACCESS_DENIED chown file \test uid=1004, gid=1004


What did I miss?

N.