Wordpress failed to connect to ftp server & Solution

I have my own blog in wordpress.com: williamjxj.wordpress.com, and I want to make a copy to my own site: http://williamjxj.com/, so both the sites will show my blogs.

in williamjxj.com server, following the installation guide, I installed the latest wordpress, then start to import XML format blog which is exported from williamjxj.wordpress.com. While I did the import, it failed and always displayed:

failed to connect to ftp server

I searched on web, and modified dirs/files permission, not work; so I am sure this is not the permission issue, it is about the FTP daemon which is not installed on the server. I searched on my CentOS server, and could not find a FTP daemon running, so decided to install VSFTP package. Fortunately, there is a very good article to explain how to set up vsftpd on CentOS 6:

How to Set Up vsftpd on CentOS 6

The following are my steps:

//1. install vsftpd daemon.
$ cd $HOME/downloads/
$ sudo yum install vsftpd

//2. make sure ftp click also installed
$ yum list installed | grep ftp
// If not, install it: sudo yum install ftp

//3. do a slight configuration:
sudo vi /etc/vsftpd/vsftpd.conf
anonymous_enable=NO
local_enable=YES
chroot_local_user=YES

//4. start the daemon.
$ sudo service vsftpd start
or:
$ sudo /etc/init.d/vsftpd start

//5. do the test, from command-line or browser:
$ ftp ftp://williamjxj.com
// It should work

After the installation and running the VSFTPD dameon, now go back to wordpress->Tools->Import page, try again, It works! Successfully install my XML blog into http://williamjxj.com.