I found this just now, so I had to see what was up. It's a simple matter of:

(1) The HEAD actor is locked by default.

(2) The HEAD actor has BEND turned off by default.

So all you have to do is:

(1) Select the HEAD. From the menu, choose Object: Lock Actor. You will see that the checkmark goes away.

(2) On the Parameter Dials panel, click the Properties tab. Click the box next to BEND to turn it on for this actor.

Now you can add magnets to it and see their effects as expected.

No import/export required. :)