samba - Oct 2002 - smb.conf and include to suite.%G

hi,
al the end of may smb.conf I wrote :

include = suite.%G

tghi for the admin group. I created suite.admin in the same directory
(/etc/samba) and when I do :

testparm smb.conf

It replies: 

Cant't find include file suite.%G , it can not resolve %G variable .

Why ?

Thanks in advance for your help , Mo