How to create a fan / like gate on Facebook?

Question

I am trying to create a simple fan/like gate. Where you specify one content for none fans and other content for fans (if they pressed the like button). However when I run th

Answer 1

Not sure why the signed request isn't showing for you. It's still working.

code: http://fbmhell.com/2011/06/facebook-like-gating-in-iframe-tabs/

page tab: http://www.facebook.com/snipe.net?sk=app_207328155971716

Maybe it's something in the migration settings that you have to check/uncheck? They've made some changes over the past few months.