Change group permissions on linux shared folder

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http://stackoverflow.com – I have Oracle Linux 5 installed on virtual machine. There is a shared folder created with samba. I can access this folder from my Windows 7 machine and copy files. My problem is, when i copy files to this folder, Group Access permissions changes to None, but I need Access: Read and write (for autodeploying on Weblogic). Samba user:linux, machine user(login):linux, group:linux smb.conf file: [autodeploy] path = /home/linux/Oracle/Middleware/user_projects/domains/base_domain/autodeploy writeable = yes browseable = yes valid users = linux force user = linux force group = linux Tried to use v (HowTos)