I had this problem as well. I posted but no one ever responded. They told me to look at packages. I placed my hostage in a cage instead, worked like a charm.
However, if someone would find a way to make it work, that'd be nice too.
Actually, I could imagine a cage working even better for my purposes...
Also, h4vent, I searched it and found some topics on it. I pulled some useful tips from them, but still no luck getting it to work.
Thanks for your replies

If anyone does know how I can fix this though, please leave me a post/message. I'd like to figure out the shackles if I can.