Make sure that on your TV:
Also, the new remote can't be "downloaded", it's a feature recently added to the Google TV/Google play movies & TV app on Android phones & tablets.
You need to download the new android tv remote framework or whatever name it has from apkmirror (for example) and then send it to the tv and install it, after that it should work just fine, on my shield and on my Sony X800H it works flawlessly
Edit: It also works on Mi Box
Just go into your android tv settings, from there go to apps then system apps. Find the remote service app and just clear data and reboot your tv then try and connect.
I have this issue as well... I tried uninstalling everything, clearing data. Nothing works. :(
I'm not certain about your device, but this may be due to Google updating the remote app on that device. If so, try the remote in Google TV and see the discussion elsewhere of that remote.