By default, all your helpers modules will be available in every view. But it’s possible that your application has a configuration to change that behavior. Check if application.rb has the following configuration:
@repoles, I added it the application.rb and even included include ExpertsHelper in my Admin::ExpertsController < AdminController, but still can’t access them. BTW I’m running Rails 3.2.18 and ruby-2.0.0-p451