I have Motion 4 and am trying to animate a paint stroke using the sequence paint behavior. However, when I select the stroke and try to change a parameter like scale or color it does not affect the stroke at all. The stroke stays the same no matter how much I try to tweak it.But when I use a preset shape in the library, it animates just fine. It only does not work when I make my own stroke. Any idea of what I'm doing wrong?