Motion paths and moving groups of objects

I created a simple rectangle and added a button to it and grouped the objects together. I then defined a linear motion path to move the group to the other side of the slide. But when the motion path runs, only the rectangle moves. The button stays in the original location. Any ideas on how to get both objects to move? They are already grouped together. I guess I could ungroup them and create a separate motion path for the button. Just wondering if I've missed an easier way to do this.

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