[Samba] its urgent:: how to set permission for subfolders in samba

[himmat baldaniya]

hello sir
	I got struct in serious problem regarding samba subfolders permission..
my query is--
I have three users in samba file          user1                                                    user2                                                    user3
and I have one share as "share1" and its subfolder "subshare1" 
the thing i have to do is that, 
i have 2 assign user1 and user2 access to share1 that meansuser1 and user2 can only access share1 through password
and user3 can access only its subfolder "subshare1"  but not "share1"
i have done this upto first level permission of share1 not able to do for its subfolder

plz help ...its urgent
thankyou 		 	   		  

 		 	   		  
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