Forum:Super Marcus Sweep Help...

So as it says, "Super Marcus Sweep Help" I have completed the mission prior to that one, which allowed me to go back into the vault for the item sweep, now that I'm on this one. The door that you must enter the code to, is already opend and the second door that I have to enter to get to the vault is closed..And I have no idea what to do; I think that in order for me to possible to this, would be for someone who needs the quest and I join in on it. (Let me know, give me your opinions And Please Help.) =[