Core FTP

This is my scenario:

I have set up a SFTP server, with enable AD users, Ignore AD home directory, and use the settings of user domain.

The permision of user domain are: R----L--I.

I want that AD users to cannot create directories/files on the server (only Read acces).

With the curent configuration, every user can write/delete on the server.
What do I do wrong?

I use version 1.0 build 288

It was already set "User settings to use" and it just ignore permisions of NTFS.

If I try using "Enable WinNT users" when I log on the home directory is "C:\program files\CoreFtpServer" instead of "E:\FTP" where are my FTP files.

Any advise?
Thanks.