[MacRuby-devel] Migrating RubyCocoa app over...

I was working on migrating an existing smallish RubyCocoa app to MacRuby. I created a new MacRuby application project then copied over my .rb files. I added the appropriate files to Resources and Other Sources. I updated all the sources for MacRuby syntax and got rid of of all the OSX prefix stuff. I then removed the existing MainMenu.nib and copied in my app's MainMenu.nib. When I try and run it the icon bounces in the dock and the window never appears. Any thoughts ? Best, Rich