Ulimate Facebook plugin multisite local install problem

I have installed a multisite wordpress with buddy press locally. I did not have the option to choose sub domain, so I created the install using sub directories. But perhaps because its a local install and my site is a local address I cannot install the facebook API to make the plugin work. So I registered the domain name I’m going to use when the site goes live, and pointed it to my computer I’m using (opened up the ports on my router) so that its viewable externally, and has an actual domain attached to it hoping that would fix it. But I still cant get the plugin to work. Any help?