Riekopo wrote I'm having the same problem. So I guess TP-Link hasn't fixed the issue yet. The new version of Utility did fix it....

Maybe your problem is caused by different powerline circuit. If the socket in your upstair bedroom is in a different powerline circuit with the one downstairs. They cannot communicate. You can try it...

You can see Spec here http://www.broadbandbuyer.co.uk/Shop/ShopDetail.asp?ProductID=17675 I'm afraid not supporting 5ghz, it's not a wireless Adapter.

replug it

From here you can download it . http://www.tp-link.com/en/support/download/?model=TL-WPA271&version=V1#tbl_b

From your description, you can connect your SSID upstairs , but no network connect, right? Did the Powerline LED lighted up? Besides wifi clone, you need to pair them together . you can refer to...