Forum:Vault 22 key card will not function

Help! I finished Vault 22 quests, the vault 22 keycard is in my inventory. It opened the Oxygen recycling door to the caves and I got the Hepa filters. I finished the quest by igniting the gas and talking to Keely, but now I can't get out the main entrance door. It's locked and says a key is necessary.

I'm locked in and can't find out how to get out. Can anyone help?