I had the same problem, it started clicking when I turned my xbox on, I took the game out and found a crack going from the inner circle of the CD to about 3/4 throgh the disc. I had to buy another Fifa, it also done this about a year ago to my Fight Night (both EA games). I have also had the circled stratch appear on both Forza and Oblivion.
I asked Microsoft and employees in the game shop and the both said to avoid the circle stratch you have to lay the xbox horizontally, apparently Microsoft ran some tests and playing the computer vertically caused the circled scratches (basically ending the possibility of getting a new xbox on waranty), they also said avoid big vibrations in an around the console as this also could scratch the game as the CD's are spinning so fast.
As for the crack and clicking problem the guy in the game shop said he had the exact same problem also with EA games and it is a manufactuing fault with there games, he suggested emailing them and getting a refund, he also said to avoid the clicking with games, you must take the games out of the console when you turn it off, because if you leave the game in there and boot it up the computer isn't set yet and could stratch your games, which is what happened with Fifa. Hope this helps.