Ragdoll seems "stiff"

[Portalboat]

It's still flopping around (Giggity), but the head doesn't bend right, among other things.
Here's a download link, so you guys can test it out.
What am I doing wrong?
http://www.mediafire.com/?fbovv546g5agxca
(This is for Garry's Mod, by the way. I know you guys hate it for some reason, but it's the only way I can test out the ragdolls.)

[Armageddon]

Who said we hate Garry's Mod?

[Portalboat]

It's just what I heard.

NOW CAN YOU PLEASE TELL ME HOW TO FIX THE RAGDOLL????



(:P)