How to make jigglebones?

Okay guys,
I got this little problem with jigglebones.

I am working on a santa hat model for css. Got the normal model working but I wanted it to have something special.
I heard something about jigglebones and I was interested in using this into my model.

Now I watched this tutorial. I did everything that he does in the exact same way.

But for some reason it only moves a couple of vertices and not all of them. What am I doing wrong?

Again, if anyone can tell me through ts/facepunch or even teamviewer I would be so thankfull.

Edit: I’m using 3ds max if that wasn’t really clear :smiley:

Skin your model properly