Miracast & Asus T100

IE11 Photos/Videos work - Swipe in the Charms, Devices, Play To - but this only enables Photo/Video viewing in IE11, it doesn’t give me the whole screen

What I want to do is connect the tablet to the Network via WiFi, which gives me internet access, and Project the tablet screen to the WDTV Live via Miracast then onto the TV via HDMI so whatever I see on the tablet screen.appears on the TV

Router → (via wired)   → AP →  (via wireless) → Tablet  → (via wireless Miracast) → WDTV Live → (via HDMI) → TV

But in Windows 8.1.1 - Swipe in the Charms, Devices, Project - the Project screen doesn’t show the option “Add wireless display” as detailed on the MS site.- without being able to add a wireless display I can’t achieve what I want above.