I Messed My Wrist Up Very Bad In A Horse

I messed my wrist up very bad in a horse accident and had an external fixator on in with two pins and a metal plate in my arm. I started physical therapy and I am not making any progress with movement. I have about ten percent active mobility up but about 20 percent passive movement up. I have about 30 percent active mobility down but 45 percent passive movement down. My physical therapist cannot figure out what to do to make my movement on my wrist improve.