After following the great tutorials from http://www.raywenderlich.com/ on how to submit your app to the app store from square one I started planning my beta test program.
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In case you haven't solved your problem, I think you can't use a wild card in your ad hoc profile. It should have the full ...com.becomingapps.dilemma signature.
You also have to upload both the icons, but I'm assuming you did that since your screenshot shows a custom icon.
It's worth the effort to get this working, my customers love it.