So I played SCP:CB(v1.3.11) , came all the way to the end, I was at the EZ and I deactivated the Door Remote Control. So I head to the Gate A and it won't open. It just says "you inserted the key card, but nothing happened." I had a level 5 Key card and I didn't use cheats. Did I do something wrong? Did I forget to do something? Am I supposed to go back to 079? Or is my game just Bugged? Please help.

After you deactivate the Remote door controls you will need to return to 079 and he will tell you what you need to do next.
Have fun