Has anyone set up their Harmony One to control an Apple TV unit? I have gotten through the online setup to the point where I can switch all my compnents, etc to show the Apple TV on the screen. I just can't get the Harmony One to control the Apple TV unit itself. Is this a common problem for controlling products that run with an Apple remote?

Any tips/siggestions -- both for setting up the Activity and for allowing the Harmony to control the Apple TV -- would be greatly appreciated.