Replying to Shots using my Glidecam are jittery.

Hey guys,

I recently bought a Glidecam HD-2000 and I have been working with it and trying to get my shots to look better. But my shots come out jittery. Not really "shaky" i guess, it is more tiny up and down vibrations. I know this is because of how I use it. What can I do to fix this?
It is more when I am trying to walk/run with it.
Is this something that is common when first learning how to really use one? Is there a simple solution (like im probably holding it wrong or something like that)? Or is it simply that I need to spend more time working with it and it just takes a while to get it right?

Thanks