I have home wifi, consisting of a main wifi router (Virgin Super Hub 2) and a one range extender (TP Link WA750RE). The problem I have is that computers connecting to the wifi network via the main Virgin router and the TP Link range extender can't 'see' each other. I've checked the range extender and it is set to the correct mode i.e. it has the same SSID as the main router and is using the same IP range and subnet mask, and there are no conflicts. I've turned the DHCP server mode off on the extender so only the main router is acting as a DHCP server, and there are no IP conflicts. I've run some ping tests and I can ping the main router from all devices, and connect to it's management console from all devices, but I can't ping devices connected via the extender from devices connected via the main router and vice versa. Also, I can't ping the extender from devices connected via the main router. Internet connectivity is working fine from all devices so those connecting via the extender are working at least to that extent. But as I say, I can't get a local Windows XP network to work at all because I can't get a connection between computers between the main router and the range extender. So any help would be very much appreciated.