New Backup - FTP Error

I am getting these errors on some of my web servers. Anyone else experience this?

PHP Warning:  ftp_put(): php_connect_nonb() failed: Operation now in progress (115) in /usr/local/cwpsrv/htdocs/resources/admin/addons/class_backupmanager.php on line 0
PHP Warning:  ftp_put(): Type set to I in /usr/local/cwpsrv/htdocs/resources/admin/addons/class_backupmanager.php on line 0

Could you please advise of the following:

What distro are you are you running CWP on?

CWP Free or CWPpro?

Public or NAT?