iPad Apps showed up on Apple TV by AirPlay

I have upgraded my old iPad to the iOS 4.3 software. After my Apple TV 2 is turned on the home sharing, I can watch the video from my iPad on my tv using the AirPlay. But how can I get my app or game to show up on the TV?The iPad 1 can't do that. The feature requires the new iPad 2 with an HDMI connection.