[Scribus] Registration marks

[Frank Cox]

I am trying to create registration marks for a full-colour issue of
the Bargain Hunter planned as the first paper of the new year.

According  to this:

http://bugs.scribus.net/view.php?id=58

registration marks have been in place since last July, but I'll be
damned if I can figure out how to make it work.

I go into add a new colour, name my colour Registration, and set CMYK
all to 100%.

But when I create a box using my Registration colour, it's black and
doesn't show at all on the C,M, or Y separation pages.

What am I doing wrong?