erm... did you add the physique (if you're using biped) or skin (if you're using bones) modifier to it? and if you did, perhaps you've deleted the animation keys in the slider.

btw, you can just save the bones' animation into a .bip or other types of animation file then load it onto another character that is rigged.

well if you just moved the biped from object A to object B that you've created AND you have put a physique modifier for object B...

1. then you must turn off the physique modifier for object A if it's inside the scene

2. AND you need to check if the physiques envelopes for object B is nicely done.

this is malaysia