WordPress as a corePHP plugin in Joomla problems urls

I’ve installed WordPress as a plugin in Joomla. The name of the plugin is corePHP.

My problem is that when I install a new plugin under WordPress, for instance WP-print or Subscribe2 the urls that should be executed through some of the links are wrong.

For instance when you click on a link for editing subscription options for Subscribe2, this url is executed: http://mydomain.com/wp-admin/users.php?page=s2_users

I can see that this is the wrong url for this site. The site trying to be called is in this directory: http://mydomain.com/components/com_wordpress/wp-admin/

So the right url should be: http://mydomain.com/components/com_wordpress/wp-admin/users.php?page=s2_users

If I try to execute the last url in the browser, I get the following error: Direct Access to this location is not allowed.

There must be a path variable that is wrong.

Could you please help me?