When the window pops up that you've killed 100 monster click the box next to the Facebook logo. Then the press green share button and make sure your pop up blocker allows the pop box for ur log in to your Facebook. Log into Facebook and click allow like any other app that needs to be approved. It should post to wall and such once it posts to ur wall ur set and you receive reals, if there's no post on your wall you wont receive the reals.