Interaction Toolbox

[clee]

Hi,

I've created a sequence diagram in EA Sparx, and went back to add the Interaction box, but for some reason I'm having trouble moving my sequence diagram into the box.

If I resize the interaction box, it takes up the whole page and doesn't let me set the size to only include the sequence diagram.

If i create a new sequence diagram, and start with an interaction box, I am able to embed all my lifelines and messages within it, and it can be resized as I need.

Any ideas what I am doing wrong?

Thanks in advance.