I have Xfinity Arris router 9SSID) Home-4022. I am trying to connect a WiFi extender: Amake Wireless-N 300 Mbps. The instructions say to plug in and connect to Wireless-N signal to use as a repeater. I get a message that I cannot connect. I tried to connect on my iPhone and iPad, laptop and desk computer many many times. If I did connect there are further directions to follow.