"No such a file or directory" when setting NETGEAR router

I got this error when I was setting up a new NETGEAR X6 router after setting up the new password. I restored the factory settings multiple times, but it either showed "No such a file or directory" for the link "http://www.routerlogin.net/genie_index.html" or pop up a dialog for user name and password, but the default "admin" and "password" didn't work.

I finally realized that it was my fault, not NETGEAR's. My laptop connected to NETGEAR X6 using a cable, but to my old NETGEAR router using WiFi. When the new router redirected the page to "http://www.routerlogin.net/genie_index.html", my laptop messed up with www.routerlogin.net because it tried to the old NETGEAR router. Turning off WiFi of my laptop solved the problem, and X6 home page showed up correctly.