halo 3 skulls?

[Richie]

I just got the final skull which was the IWHBYD skull i picked it up waited a few seconds, then dropped it, saved and quit. I went to use the hayabusa helmet but it was locked. I checked which skull i hadnt got and it was the IWHBYD one. But i definately did pick it up, why didnt it work?? does this mean i have gotta do that whole mission again?? (I've lost my save point because i played a different level on campaign)

 

[Leo]

u Need all 9 of them Not only the last one

 

[Gangstalicious J]

i thought u had to hold it for 1 min

 

[Shikamaru]

Yes, you have to do it again. Just to be safe, carry that skull with you until you jump down the little thing to the end. That's what I did and I got it. Shouldn't be any enemies left.

 

[me and no one else]

that happened to me go bak to that lv and get it