I am having trouble to set up the plugin - but having difficulties

I have set up a page on a dummy site - testing and developing - http://www.dhd.co.uk. The plugin is on this site and I want to have facebook comments for the various letters appearing on separate blogs on the wordpress site...but seem to have lost my way! Please advise, cant seem to see any videos neither. FB is https://www.facebook.com/CampingAndCaravanning