Looks like you didn't link your bones together. Link the jigglebone to the bip_head and it should be resolved. Also on the idle model, don't use an idle from a completely different hat. Just put the name of your hat's .smd in there and it'll be fine. If your hat is named "teacup.smd" then put "teacup.smd" as your idle.
Hey there, I'm having a problem applying Jigglebones to a model I'm working on for TF2. Now, I should point out; I'm a complete novice at modelling in general. I've got one hat I created submitted off to TF2's Contribute, and this is my second one; it's also my first to implement jigglebones. My model. The problem. My…