[Samba] multiple permissions, multiple groups

[garith]

Hi,

I have a problem, i can specify permissions on a specific share by using
"Security and access control" after clicking on the share in the share
listing, but when i save and save again and go back to the share
listings its picking up one of the permissions settings and not the
other.  eg. i specify read only groups as test
		and read/write groups as garith

	then when i save and save again i see that says

	Read only to group test
	Read/write to all other known users

	is there a way for me actually specify that the read/write 	permissions
are only for group garith instead of it saying "to all 	other known
uswers"?

thank you

garith