To add a WordPress blog, You have to prepare following informations.

API address

The API address of WordPress is http://url.to.your.blog/xmlrpc.php.
If your blog address is http://yoursite.com/ then your API address should be http://yoursite.com/xmlrpc.php
If your blog address is http://yoursite.com/wordpress/ ，then your API address should be http://yoursite.com/wordpress/xmlrpc.php

User name

User name is the name that you log in to WordPress

Password

The password is the one that you use to log in WordPress

Then follow these steps:

1. Enter add source page
2. Choose metaWeblog api
3. Enter API address, username and password, click add
4. Done.