Setting up Affiliates plugin with Membership

I am trying to setup the Affiliates plugin. I have it activated and the Affiliates menu is on my dashboard. I can't seem to get it to display the generate button (from instructions "4. Go to Affiliates > Options and click the Generate button. This will add a new page to your site with a default Affiliate Area that you can then edit if needed.")
I seems like it is not recognizing that I have a registration on my site. I do have Membership activated on my Add-on page.
Thanks for any help.