Right.Ring number 1 is when u enter the room and sevens were u kill the prophet of truth.

Things u proberly have to do before u do the code:

kill th 2 scarabs

kill all the enemies

kill all the flood

Now jump through the rings in this order 1,3,4,6,7,5,4,6,5,4,5,3,4

it does work trust me :) :) :)