From experience: FKG can take quite a while to load on a single-band wifi.

Other possible problems:
-Flash must be enabled
-Some other options might have to be enabled as well
-FKG might not run (properly) on some browsers. I have no idea how it runs on Microsoft Edge for example, which is NOT the same as Microsoft Internet Explorer.

i use chrome it works fine and whenever they do maintenance remember to clear cookies and cache