How do you play Fallout DLC "Broken Steel"?

I just got xbox live this morning and i bought the "broken steel" download but i can't figure out how to get to it. I went to the downloads screen on the main menu and that didn't help. I also tried finish my regualr fallout 3 game and nothing happened then either. PLEASE HELP!How do you play Fallout DLC "Broken Steel"?
Not sure if this helps, but this is what's on Bethesda's website:



How do I start Broken Steel?



You must play the game for a couple minutes for the Broken Steel content to appear. After a couple minutes, a radio beacon and the questline will become available. To begin the Broken Steel questline, you must complete the main quest by finishing "Take it Back."



With Broken Steel, the main quest of Fallout 3 will have to be completed before the new story unfolds. If you have not completed the main quest, your character will still be able to take advantage of the level cap being raised to 30.How do you play Fallout DLC "Broken Steel"?
Once you've purchased and downloaded any DLC for Fallout3, all you need to do is load the game as you usually would. Right after the screen with the Brotherhood of Steel helmit on it, you should see a box pop up that says "Loading additional content" (or something similar) for a few seconds.



If you see this box you're good. Just play the game as you normally would and a new radio signal will be detected, starting a quest.



If you don't see the box then its an issue with either x-box live, or your x-box itself. If this is the case you probably have to contact microsoft.How do you play Fallout DLC "Broken Steel"?
Hmm... Well, Broken Steel takes place after the end of fallout 3. If it doesn't start after you finish it, I don't know what's happening.



Jared.
Well usually it should work after you die on the last bit.

if you did choose to die.

If it still doesn't work try uningstalling it and then download it again.