Animation problem

I have this problem in unity where i am trying to get the shoot animation working so far it works when i put a lookmouse script on the model itself, i watched a tutorial http://www.youtube.com/watch?v=6oo8NyalY6o&feature=plcp

i started to use the lock spine on my spine and only the gun has the animation on it and the hands lose the animation, I dont know whats wrong

Update I know what is wrong with my animation now, it is because i keep disconnecting my bones from the root bone, however i need to do this to have a Spine lock to i can rotate on the Y axis although i still have no work around for this