Ableton Live Rewire Not Showing in Cubase 8 64 bit, mac osx

When I use and install Cubase 8 32 bit, with Ableton live 32 bit, I can see ‘Ableton Live Rewire’ in devices in Cubase and use it wonderfully with both syncing up and audio coming into Cubase. However when I open Cubase in 64 bit, and use the 64 bit version of Ableton, the ‘Ableton Live Rewire’ button is gone in Cubase and I can’t use it. Is there a way to use the rewire function in 64 bit? Any suggestions welcome. Thank you!

Mac OSX 10.10.5
Ableton Live 9.6.2
Fireface 800