If so, you can just quit using wi-fi clone. Please use the PowerlineScan utility to log into the management webpage of your WPA4220, then you can configure your extender's wireless settings manually....

Well, maybe you can try to play some low resolution video.

Cloning exactly means creating a new wi-fi network. Just the new wi-fi network has the same SSID and access key as your wireless router. You can roam between these two wireless networks. Here is a...

US ver powerline adapters can be only used in US. The power supply is different in different areas.

Maybe there is too much electric noise in your powerline circuit which affects your powerline adapters' performance. Anyway, you can contact the retailer from whom you bought this product to replace...

There is a reset button on your WPA281. You can try to reset your WPA281 via pressing this reset button firstly, then use powerlineScan utility to find this device.