[Samba] Can Map shares but cannot write

[Michael Lyon]

Here is the scenario:

AD-authentication is functioning fine.  I can query users and group info
from wbinfo and getent just fine.

The clients can map to the shares, but cannot write to the shares.  I have
tried variations of chmod 777 on absolute paths to enable read/write access
to no avail.

The share is configured as such:

[student]
    comment = Test share
    path = /home/share/students
    public = yes
    writeable = yes
    browseable = yes
    create mask = 0770
    force create mode  = 0770
    directory mask = 02770
    force directory mode = 02770
    directory security mask = 0775
    admin users = DOMAIN\Administrator
    valid users = @"students"
    write list = @"students"
    inherit permissions = yes
    inherit acls = yes

The error log reports:
[2010/06/29 09:42:45,  2] smbd/open.c:2447(open_directory)
  open_directory: unable to create New folder. Error was
NT_STATUS_ACCESS_DENIED
[2010/06/29 09:42:45,  2] smbd/open.c:2447(open_directory)
  open_directory: unable to create New folder. Error was
NT_STATUS_ACCESS_DENIED
[2010/06/29 09:42:45,  2] smbd/open.c:2447(open_directory)
  open_directory: unable to create New folder. Error was
NT_STATUS_ACCESS_DENIED
[2010/06/29 09:42:45,  2] smbd/open.c:2447(open_directory)
  open_directory: unable to create New folder. Error was
NT_STATUS_ACCESS_DENIED
[2010/06/29 09:42:45,  2] smbd/open.c:2447(open_directory)
  open_directory: unable to create New folder. Error was
NT_STATUS_ACCESS_DENIED

Mike