Ring2 Doorbell on BT Hub6 router

Has anyone ever connected their Ring2 doorbell to a BT home Hub router.? I have tried two Ring2 devices now and neither can joing the selected network. I have tried all the usual reset, power down/up etc. I have also been in the router and switched off the 5Ghz band and used various channels. No matter what I try the device can detect the network but when selected it cannot join it and times out. Any help really appreciated.