Your receiver will need to be connected to the WiFi network in your home. Your tablet must be connected to the same WiFi network as your receiver and wireless router. Tap the top right corner of the application where a receiver is listed (or where "no receiver" appears). This will bring up a list of receivers associated with your DIRECTV account which are connected to your home network and are eligible for control. Tap the receiver you want to control. If one or more of your receivers is not listed, this means they are not currently recognized on the network (tap the top right corner gear icon to get more information).