I have 4 TP-7020P devices on my network, one connected to the router and another 3 in different rooms in the house - it all works fine.

I want to extend the network and purchased a TL-WPA4220P (AV600) extender which I hoped would extend the wi-fi into another room with 2 ethernet sockets as well.

I have followed the instructions for setting up and adding this unit but without success so far.

1) Plug the AV600 into a standard wall socket in the same room as the router and main TP-7020 - tick

2) Power off the remainign 3 TP-7020Ps - tick

3) Press 'pair' on the main TP-7020 for approx 1 second - tick

4) Press 'pair' on the new TP-4220 (AV600) - tick

5) Wait for the 'pairing' led on the TP4220 unit to stop flashing and stay on solid - tick

6) Turn on the remaing TP7020Ps and wait for them to rejoin the network - Fails, the powerline LEDs stay on RED.

Am I mixing the wrong units or am I missing a vital step somewhere?

All and any help and advice gratefully received

Thanks

Trevor