For WordPress you should check this link http://www.question2answer.org/wordpress.php
In your qa_config.php file you shoud add this
define('QA_WORDPRESS_INTEGRATE_PATH', '/PATH/TO/WORDPRESS');
Where '/PATH/TO/WORDPRESS' is your wordpress path (not url) but relative path
In your case your Q2A is in sub folder of wordpress so you need to add simply ../
define('QA_WORDPRESS_INTEGRATE_PATH', '../');