Standard Oxwall Captcha is the set of numbers/letters displayed at the end of the join form to determine whether or not the user is human. It is also used when user sends several private message within a short period of time (“Mailbox” plugin).

If you see broken image instead of Captcha, first of all make sure that you have GD library with FreeType support enabled on your server as those are required to display Captcha.

1. Open /ow_includes/config.php file on your server via FTP on Control Panel.
2. Find following line within config.php file:

    define('OW_URL_HOME', 'http://sitename.com/'); 

3. Add

   phpinfo();

   Overall you should have

   <?php
   define('OW_URL_HOME', 'http://sitename.com/');
   phpinfo();
   define('OW_DB_HOST', 'localhost');
   ......
    

4. After saving changes open your website's homepage. Don't panic. Within the long list of tables with data find “GD” section:

GD Support should be enabled. FreeType Support should be enabled. If they are disabled, contact your hosting company and ask them to enable both for you.

1. Remove

   phpinfo();

   from config.php file.