May be the user name or password has been converted to uppercase

check you own ip address,if the ip is 192.168.1.xxx,you should visit http://192.168.1.1. if the ip is 192.168.0.xxx, you should visit http://192.168.0.1

Use an Ethernet cable to connect the main router to your TP-Link wireless router through their LAN ports (any LAN ports may be used). All other LAN ports on your TP-Link wireless router will now...