When registering the MAC address of the PCWL you are using, please register both the MAC address written on the sticker attached to the main unit and the one with the first two digits changed from 04 to 06 (e.g. 04 ⇒ 06).
(For example, if the MAC address written on the main unit is 04:2B:BB:00:25:5B)
04:2B:BB:00:25:5B
06:2B:BB:00:25:5B
Please register both of them.