Forum:OMG new guy needs help with Armory - how do I get there?

Here's my problem - My son and I each have our own Live account. I have finished the game and am on the second walkthrough. My son is still on his first walkthrough. Last night, we downloaded the Armory to his account. Interestingly, on his account, it shows downloaded but on mine, it does not.

On XBox Live games, when we go to an outpost, T-bone Junction shows when I go on xbox live alone and it shows when he goes on alone. The problem is when we play single player offline or splitscreen offline, neither of us can get there when either of us starts a game.

How do you get there? If he has to finish the game, that's fine, we can do that, I'm just trying to figure it out, it is very frustrating.

Any ideas would be helpful. Thanks guys.