Help creating a pattern

[Sliverfoot]

I'm hoping that some can show me what I'm doing wrong here.
I am trying to create two patterns for my pattern library that I can use when making frames for my lithos. I really just want a blank top/bottom piece and an blank side piece. Then I can fill in any text or figure that I want, and cut it out on the table saw.
I've been laying out a piece, clicking on group on the bottom, right clicking on the group on top and selecting "make pattern".
But when I try to use the new pattern first of all there isn't any picture of it, but more importantly it crashes my designer. (i'm using pro)