[Plugin: Add Link to Facebook] Problems with authorising

When I try to authorise the plug in I receive the following error message

Forbidden

You don’t have permission to access /components/com_wordpress/wp/ on this server.

Which doesn’t make any sense as it is my site and i am the administrator.

I also am very unclear at the moment at how to make this link to my facebook page and not to my facebook profile. So far i haven’t seen anywhere where it’s asked for the url of my facebook page?

http://wordpress.org/extend/plugins/add-link-to-facebook/