[Samba] problem changing permissions

[James S. Martin]

Whenever I try to add or remove a user for access to a file I get the 
following error:

"Unable to save permission change on <filename>.  Access is denied".


I took a look at my smbd log file and found this:

[2002/08/29 10:40:00, 5] smbd/posix_acls.c:unpack_nt_owners(433)
   unpack_nt_owners: validating owner_sids.
[2002/08/29 10:40:00, 5] smbd/posix_acls.c:unpack_nt_owners(474)
   unpack_nt_owners: owner_sids validated.
[2002/08/29 10:40:00, 3] smbd/dosmode.c:unix_mode(111)
   unix_mode(test5.txt) returning 0777
[2002/08/29 10:40:00, 3] smbd/posix_acls.c:set_nt_acl(2249)
   set_nt_acl: chmod test5.txt. perms = 0777.
[2002/08/29 10:40:00, 3] smbd/posix_acls.c:set_nt_acl(2253)
   set_nt_acl: chmod test5.txt, 0777 failed. Error = Operation not 
permitted.
[2002/08/29 10:40:00, 3] smbd/error.c:error_packet(91)
   error string = Operation not permitted
[2002/08/29 10:40:00, 3] smbd/error.c:error_packet(106)
   error packet at smbd/nttrans.c(1714) cmd=160 (SMBnttrans) 
NT_STATUS_ACCESS_DENIED
[2002/08/29 10:40:00, 5] lib/util.c:show_msg(268)



I'm not sure what is causing this.  Any ideas?  Here's a copy of my smb.conf



[global]


security = user
log level = 5
socket options = TCP_NODELAY IPTOS_LOWDELAY
dead time = 15
getwd cache = yes
workgroup = COOL
server string = have a nice day
encrypt passwords=yes
netbios name = LINUX-NAS
level2 oplocks = no
oplocks = no


[stuff]
browseable=yes
comment = test files
path = /local/nas
valid users = nasuser
writable = yes
printable = no
delete readonly = yes


Thanks,

James