I think you need to enable it on aTV Remote settings first. IMHO that also involves learning the commands from the donor remote. PS the system is pretty clever - it is the aTV box itself, that learns the IR commands from any IR remote and then programs the Siri remote accordingly. Siri remote does not come with any pre-programmed IR-codes or device programming codes, like most others do. Check the aTV manual for details on how to do that.