IWHBYD skull in halo 3 is not there after I jump threw the rings!?

[Erik]

I have all the skulls besides the IWHBYD skull. I went on the internet and found the order to jump threw the rings and I start at begining of lvl on normal and jump threw them all but the skull dosnt appear after!!! Plz Help

 

[redsoccerdude]

You only need to do the last seven or so rings. After you do it right about 5 secs or so after all of the rings flash in consecutive order and the skull will appear where the Arbiter killed the prophet. Also, MAKE SURE EVERY SINGLE FLOOD IS KILLED!!