[MacRuby-devel] Could not connect button:

Hi all, I am trying to understand and solve this issue. First of all, I did the following step by step: 1) Create a new project 2) added 'buttonClick(sender)' method to AppDelegate class in AppDelegate.rb -- like this class AppDelegate attr_accessor :window ... def buttonClick(sender) puts "testing" end ... end 3) clicked MainMenu to open a GUI editor 4) dragged a button to the window. 5) open button's Connections Inspector and linked button to 'buttonClick' 6) Click Run button to build the app and execute app The following error from Xcode 4's output console: Could not connect the action buttonClick: to target of class AppDelegate Any idea why am I getting this error and what did I do anything wrong? Thanks! -- Bryan