Anker A7722 Won’t Pair

My A7722 keyboard stopped working with my iPad Air 2. It is fully charged but won’t pair. When I press FN and the Bluetooth key it won’t go in to pairing mode. Any suggestions!

Did you press FN+Z?

Yes. Still not going in to pairing mode.

Did you go into the Bluetooth settings of your iPad and “Forget this Device,” before trying to pair it again?