[CentOS] access denied from windows changing security setting when i use a folder connected to a fake drive made with dd

i make a image file connected to /dev/loop0 formated as ext4 partition
and connect it
losetup /dev/loop0 /root/disk.img

then make format the loop drive with
mkfs.ext4 -o rw,usrquota,grpquota /dev/loop0 /disk
connected it to /test

the only way to write there other users except root is setting with
chmod o+w /test

from windows 7 using samba 4 i can write to folder but i cannot set
security setting getting always access denied when i am setting
security settings on the share

what is wrong

thank you

sarantopoulos nikos