So we just changed our internet provider and the main adapter connected to the router as the start of the powerline "mesh" is from the TL-WPA4220 KIT. The adapter that was part of the set has connected without issue and is providing a consistent and reliable connection via ethernet to my PC. However, another member of my family has recently got a PC and so we needed to get another adapter. That was when we got the TL-PA7017 KIT which offers a higher connection speed than the original kit. I understand that the powerline network will not go above the lowest adapter in the network which hasn't become an issue at all. However, since we changed internet providers, the TL-PA7017 KIT will not connect to the main adapter linked to the router. When I open the TP-Link Utility app, there is a red line with a "?" going from the main adapter. Resetting each adapter has not fixed the issue and I have reset the PC's networks in an unsuccessful attempt to see if the issue would be resolved by that. Is there something that I have missed? If anyone can assist that would be amazing!

Thanks in advance, 

Jenko