Backup : ftp not working

I have freebpx distro, installed asterisk 13, and I am trying to use the backup module to ftp.
I have 3 freepbx servers on 3 distance locations and trying to backup to a central backup location.

I am keep getting the : ftp_chdir(): Failed to change directory message

I have test that ftp is working since I can ftp manually and log in correctly
I do not want to change directory

I have tried putting the correct ftp path, not putting any path, putting a slash at the end, no slash, create a directory inside with the name of the backup.

nothing is working. is it a bug or I am doing something wrong?

Please help