Can't apply a mould to this drawing

[diniel]

I'm using XaraX¹ 1.1d CD and am having mould problems.

I can apply a mould to any new shape that I draw in this or a new document, but the drawing of a front door that I've made just won't go into a mould. With this drawing selected - either grouped or not - the mould toolbar is greyed out.

Can you see what I'm doing wrong please?