I followed the guide at http://flamesoffeenix.wordpress.com/2007/09/27/halo-3-skull-locations/ in order to get the Skulls in Halo 3.
The last Skull mentioned is the "I Would Have Been Your Daddy" Skull.
IWHBYD Skull Unlocks hidden dialogue throughout Halo 3’s campaign. Location: Currently, the ‘IWHBYD (I Would Have Been Your Daddy) Skull’ has yet to be found by the public. Only members of the Bungie team know the location of the final Silver skull in the game. The IWHBYD Skull has now been found! Here’s how to grab it for yourself and unlock that Hayabusa armour:
Located on the level, ‘The Covenant’ – After defeating the two Scarabs, head inside to confront Truth and get to the location with all 7 ring holograms. Here you must jump through the rings in a specific order to make the skull appear.
That order is as follows (1 is where you came in, 7 is nearest Truth): 5 4 6 5 4 5 3 4
Jump through them in the correct sequence, and the ‘I Would Have Been Your Daddy Skull’ will appear as if by magic, right next to the bridge that brings you over to the Prophet of Truth.
It’s worth mentioning that you may want to take down Truth and the rest of the Flood BEFORE tackling the jumps though, it’ll make things a lot easier.
I followed these instructions but nothing happened and I didn't see the skull in the location the instructions say it should be.
The instructions also don't mentioned whether there is any indication that you've done the steps correctly, is there any?
Do I have to jump through the rings in a particular direction as well as the order?