Check your /includes/configure.php file and find (it may differ from this)
Code:
define('DIR_WS_PHPBB', '/');
change entering your variables
Code:
define('DIR_WS_PHPBB', '/var/www/vhost/accountname/public_html/soulesgarden.net/phpbb2/');
If in doubt see the last line:
define('DIR_FS_SQL_CACHE' where your path variables will be

This should get it