Use the screenshots below as a guide to setup your facebook application. The only pages you need to look at are the ones shown below and should be setup as shown.

NOTE: This screenshot may not match what you see. I will update when facebook has something consistent. Right now they have many versions depending on the date that you created the app. Pay very close attention to App Domain and Site URL. They must be properly set. If your dolphin site does not use the www prefix then you CANNOT use it in the facebook site url setting. The module will not work if this is not properly setup. If http://www.yoursite.com/modules/?r=deanos_facebook_connect/logon_form/ does not work for you then try just http://www.yoursite.com/  NOTE: The trailing / at the end of the URL. Facebook is picky about that, and must be there. And the domain must be just a domain name. No sub domain prefixes. Just the domain name. Again. Module will not connect to facebook if this is not properly setup.

NOTE: This screenshot may not match what you see. I will update when facebook has something consistent. Right now they have many versions depending on the date that you created the app. For the most part, all options in migrations are to be disabled unless I specifically show one enabled. If the setting I have enabled does not exist in your migration list, then facebook has already defaulted it to enabled.