First, check that you added the necessary ACF code to your templates. If you don't know what I'm talking about, read up on how to use <a href="http://wordpress.org/extend/plugins/advanced-custom-fields/">Advanced Custom Fields</a>. If you're already familiar with ACF and you still can't figure out why the menu isn't showing up, start a new support thread, include details and a little code, and I'll do my best to help you.