FreePBX back-up FTP error

the point is that via FTP to the shell it all works without problems including the PUT file

Asterisk 13 FreePBX 13

here is the log

July 28, 2016, 3:12 pm - data: Backup Lock acquired!
July 28, 2016, 3:12 pm - Backup Lock acquired!
July 28, 2016, 3:12 pm - data: Running pre-backup hooks…
July 28, 2016, 3:12 pm - Running pre-backup hooks…
July 28, 2016, 3:12 pm - data: Adding items…
July 28, 2016, 3:12 pm - Adding items…
July 28, 2016, 3:14 pm - Building manifest…
July 28, 2016, 3:14 pm - data: Building manifest…
July 28, 2016, 3:14 pm - data: Creating backup…
July 28, 2016, 3:14 pm - Creating backup…
July 28, 2016, 3:14 pm - Storing backup…
July 28, 2016, 3:14 pm - data: Storing backup…
July 28, 2016, 3:14 pm - data: Creating directory 'home/claudio/auto-q/Copia_Auto_Q’
July 28, 2016, 3:14 pm - Creating directory 'home/claudio/auto-q/Copia_Auto_Q’
July 28, 2016, 3:14 pm - data: Saving file to remote ftp
July 28, 2016, 3:14 pm - Saving file to remote ftp
July 28, 2016, 3:14 pm - data: Unable to upload file to the remote server
July 28, 2016, 3:14 pm - Unable to upload file to the remote server
July 28, 2016, 3:14 pm - data: Running post-backup hooks…
July 28, 2016, 3:14 pm - Running post-backup hooks…
July 28, 2016, 3:14 pm - data: Backup completed with errors!
July 28, 2016, 3:14 pm - Backup completed with errors!

someone has a tip?

Nobody Had Problems using the FTP Service copies?