Hello

I am currently on the side mission for the brotherhood of Fixing the Air Filtration System, where you have to go to 3 vaults to collect parts. I have made my way over to Vault 22 (with all the growing plants in it) and heres the thing...

I have done the side quest where you have to go into there and collect data about the plants and rescued keely. I told her that I dont know who took the data and i blew up a gas station to kill off the plants etc

however now when I go back down into Vault 22 the door I need to open to get the part for the air system is now locked. This video below shows which door I am talking about:

http://www.youtube.com/watch?v=X3jip-Task8 at 6:28.

Theres a computer terminal next to the door and in this video the guy opens it with no problems. However when I try it says access denied.

So am I able to finish this quest off? If not do I just continue on with the MAIN story and either join the brotherhoods side or go against them?
Or is there a way of getting that part for the air system?

Thank you for your time
I hope somebody can help
Cheers

Maybe you could try the stairs, if not then if you're on pc you could try to no clip?

You'll need the Vault 22 Cave Door Keycard.
From the Wiki,

thanks!

but i cant even get to that door yet anyways. the door im stuck at is electronic and no key is required. have a look at the video and you'll see

thanks

wooooo ive finally done it thanks guys

You can reach the common areas by using the elevator without problems. There, you'll find the terminal access card to that door, you don't need to get through anyway.
On the 5th floor, Pest Control, you'll find a door supposedly leading to the Food Production level, go through it, and you'll find yourself in the same cave system you would have gotten into by going through that terminal door.
Follow the path leading upwards, and you'll end up at a door leading to the room where the HEPA cartridges are located