Cubase 5 not listing Reason 6.5 as a rewire client

I would really love to be able to run Reason 6.5 as a rewire slave in Cubase 5. I tried a year ago but gave up after someone told me it is not supported.

Recently, I heard that it was. I have verified that I am running both programs as 64 bit.

First, I open Cubase. Second, I open Reason.

I go to the Device menu in Cubase and Reason is not listed as a rewire client. It is just not there.

Has anyone ever had success running Reason 6.5 as a rewire client in Cubase 5?

If so, how did you do it?