Installing the Beta

I have an Apple TV 3 (revised one) and I am trying to connect it to my computer via usb. I have mavericks install and Xcode 5 dp 4. Also I have tried iTunes 11 an 11.1. First I plug in the usb to my computer and the apple tv, then I plug the apple tv into the power. The apple tv goes into the rapid blinking mode, but the apple tv wont come up in iTunes or Xcode devices though. I have tried everything. Any suggestions?