Maybe mariadb not restart. Try 'chkconfig mysql on; sh /script/restart-all'.
If still not work, try 'sh /script/reset-mysq-root-password YOURPASSWORD' (for mysql root) and 'sh /script/resetpassword master YOURPASSWORD' (for kloxo panel).
It's weird, I tried 10 minutes ago on KVM VPS for CentOS 6 64bit. No issue.