Fable 2 Requests

I bought Fairfax's Castle and am stuck in a tomb where I have to shoot at a floating orb to get through a sealed doorway. It requires me to shoot the orb to a stone slot, but every-time I shoot at it the orb deflects to the opposite side, even as I can sometimes hit it 2nd time, but and I'm back to square 1. How do I get it to go where it needs to go as I can't leave the place as it says I will loose what I've done already and never return?

I bought the Castle Fairfax Castle and slept in the bed. I was awakened to the servant who informed me that the castle was under attack and went to fight the bandits and followed along to go to a water filled tunnel and the trail led to a closed door way filled with debrie and a floating orb. I can't shoot the orb into the slot as I've shot at it, but it goes towards the other side and then zooms goes back to the start point. I can't leave the area as I would forfeit all I did to that point and nothing will make it go where I want?

demon doors

can someone give me a sure way to get rich?!?!?!? i really need the money.