Logged in to TVNZ On Demand tonight to catch up on Big Bang Theory to discover it's not working. I'm on a little Windows box running 8.1 with Bing. It was working a week ago. I tried on both IE11 and Firefox and both are up to date. I can log into my account and browse to the video I want, but I just get a dark grey box. All the control icons are there; play, volume, full screen, but I can't click on any of them, and the video never loads. It's the same on both browsers. I can watch TV3 and Choice TV's on demand sites, so I assume flash is working okay. I can also view the video on my iPad so I know the service isn't down.

I've tried:
Clearing my browser cache
Clearing my Flash cache
Resetting my Flash licence
Made sure Flash was up to date
Ran latest Windows updates and restarted the computer
Added TVNZ On Demand to Flash trusted sites list
Checked "allow all sites" in Flash settings
Disabled protected mode (briefly)

I'm at a loss. The reason I got the little PC was to watch TVNZ On Demand on the TV, so this is rather annoying. Any ideas how I might rectify this?