Distribute to Layers
As you know from previous assignments, Motion Tweening won't work properly when there is more than one drawing on a layer. If you followed this tutorial to the letter, you will have MANY MovieClips on a single layer.
To fix this, select EVERYTHING on the stage by selecting the keyframes where everything resides. You can also use the keyboard shortcut CTRL+A
Next, Right-Click on any of the selected character parts and choose Distribute to Layers.