You can't have both at the same time! You need to put the RFX9400 into network mode. If you do not have a wired network point close to the extender you can use a crossover cable and a PC and change the settings so the RFX9400 will also connect to the wireless network.
TSU9600, TSU9400, RFX9600, RFX9400, RU980, RU950, and the good old RU890 which stilll learns codes none of the others will!