Invite Code form element not appearing on registration form.

I was using the lite version of Membership and decided to move to the Premium version. I had it setup to use an Invite code. All was fine in the lite version but when I moved to the Premium it doesn’t want to appear. I’ve tried the repairing the tables, removing and adding the option, non popup registration vs popup and a couple other things I can’t remember. I just can’t get it to appear. Any ideas on how I can fix this? Thanks

Keith Andersen