If you are getting 530 Login failed error in Kloxo, then you can follow the steps to resolve this error.
# rpm -qa | grep ftp
Make sure only pure-ftpd exists. Uninstall if any other ftp exists.
Downgrade pure-ftpd
# yum downgrade pure-ftpd
Do an upcp
#/script/upcp #/script/cleanup
#yum -y update
Restart xinetd service
# /etc/init.d/xinetd restart
That’s it ! ?