http://www.question2answer.org/wordpress.php i readed it. when i try mysite.com/qa i have this:
Welcome to Question2Answer. It's time to set up your database!
When you click below, your Question2Answer database will be set up to manage user identities and logins internally.
If you want to offer a single sign-on for an existing user base or website, please consult the online documentation before proceeding.
but its not integrate i think right? not writing about wordpress nothing?
Yes, it should say something like "When you click below, your Question2Answer site will be set up to integrate with the users of your WordPress site..."
Have you set up WordPress, and set the QA_WORDPRESS_INTEGRATE_PATH variable in qa-config.php?
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.