y916kma?

I have tried to lock my car with the fob and it did not work so I locked it with the key witch did work. when I have tried to unlock my car with the fob, it didn't work so I tried to unlock all doors and boot with the key and none of these are working also. I have changed the battery in my fob and it still is not working. I also do not have the red key. I think I have the wrong key as most ford will lock with any key but will not unlock. any ideas of how to get in my car?
Thanks,