Head Warfs (Distorts - Moves with the camera)

I'm brand spanking new to CH. I just completed the Building Your Own Animated Face, and decided to repeat this from scratch without the template. My puppet has a round face which warfs. I've only added the eyes.

The file

+Character

       Head

          Left eye

               +Left pupil

               Left eyeball

          Right eye

               +Right pupil

               Right eyeball

          Face Background

Ideas?