Activating and home sharing

I moved my apple tv from one room to another and now it won't activate. Why is that?

Also

I can't connect to home sharing. It says that my ID or password is wrong but its not. I've tried Unplugging my apple tv, restarting it, restoring it, and unplugging my router. Why is it not connecting and what can i do to solve it?

I would really appretiate some help. This is driving me crazy!!