group ownship stop working -- pease forward to samba mailing list

> Hi All,
>=20
> I have encountered following issue after everything worked fine for a =
year:
>=20
>=20
> 	I have a unix directory /proj/admin  which group ownership is UNIX =
group of "engadm". In samba, I configured as following
>=20
> 	# This one is /proj/admin
> 	[admin]
>   		 comment =3D project admin
>   		 path =3D /proj/admin
>    		writable =3D yes
>    		valid users =3D @engadm
>    		create mode =3D 0664
>    		directory mode =3D 1775
>    		case sensitive =3D yes
>    		mangle case =3D yes
>    		strict locking =3D yes
> The "admin" share only works when I have a UNIX account with primary =
group ID is "engadm". If I have an unix acccount with "engadm" as =
secondly UNIX group(which means the primary group is something else), it =
will keep prompting me usrname/passwd when I try to mount the share on =
my PCs. Then no matter what username/passwd I try, it always fails.=20
>=20
> If I do $ ./smbclient //js1/kitsdev -U username%passwd=20
> added interface ip=3D10.13.46.29 bcast=3D10.13.46.255 =
nmask=3D255.255.255.0
> Domain=3D[LOCERD01] OS=3D[Unix] Server=3D[Samba 2.2.3a]
> tree connect failed: NT_STATUS_WRONG_PASSWORD
>=20
> If I change my unix account primary group to be "engadm", I'll have no =
issue:
>  ./smbclient //js1/pdt2 -U username/passwd
> added interface ip=3D10.13.46.29 bcast=3D10.13.46.255 =
nmask=3D255.255.255.0
> Domain=3D[LOCERD01] OS=3D[Unix] Server=3D[Samba 2.2.3a]
> smb: \>=20
>=20
> I have to stresss again that this configuration worked fine until =
suddenly one day issue came out. All samba configuration has not been =
changed before and after the problem came along. Since I am a UNIX =
administrator, I do not have much idea  what happened to Windows =
environment. Please advise what could causes this failure.
>=20
> Thanks
>=20
> Min Yang
>=20
> Intel Corp.
>=20