Walking issues

I've been working on creating a puppet from scratch, can do most things, but for some reason I can't figure out how to get the walk function to work. I've watched the same tutorial, and I've had little success. What am I doing wrong to prevent the walk function from happening. I've tagged everything, made sure to mirror what I saw on the tutorials. Also, sometimes the head bounces and other times it gets distorted, what am I missing?