Access levels changes everytime

Why does my access level for a shared directory in Linux change everytime , from
drwxr–xr–x 2 root user 6 Jun 14 11:01 Admin/

to

drwx–x–x 2 root user 6 Jun 14 11:01 Admin/

Then I get a message “Access denied” when try to access it. I have checked the /etc/samba/smb.conf…all seems to be fine. Please advice.