In latest Kloxo-MR 7.0, ftp using init.d service. But, in Kloxo-MR 6.5, ftp still use xinetd service.
To make sure ftp running well in Kloxo-MR 7.0, run 'chkconfig pure-ftpd on; sh /script/restart-ftp -y' and then go to 'admin > ftp configure' and click update.