Model : Hardware Version : Firmware Version : ISP : i have bought 2 av500 powerline adapter( model no. TL-PA411KIT). i've tried to switch socket and switch the two adapters but nothing what can i do?

I recently brought a TL-PA4010 KIT AV600 to boost wifi in my home. I already have a TL- WPA4220 installed and have followed the instructions to ass the new extenders. At first they worked fine but aft