Reply to Ableton Live 9.1 and FL studio 11

Greetings. Hopefully someone on here can help me with an issue.

I want to ReWire Ableton(master) and FL studio(slave) but I can't seem to get it to work. Both DAW's are 64bit but when I open FL studio the rewire button doesn't show up like it used to. Any ideas why? I have the most current versions of both DAW's so I really have no clue what i'm doing wrong now.

I'm running windows 8 64bit if that helps.