samba group share not writable by group

[micke]

Hi,

I have problem with samba.
When I create folders from windows xp, I get drwxrwx---
But when I creat folders from a macosx I get drwxr-xr-x

I need inte to be drwxrwx--- for win and mac.

We run fedora 8.

smb.conf
[space]
path = /home/share/space
writeable = yes
valid users = +"Unix Group\kunder"
force group = kunder
create mask = 0775
directory mask = 0775