Hi all. I was told by the seller that the spare key needed a new battery, which I thought "fair enough, got a battery at home". Put the battery in today, put it in ignition to position 2 and held the lock and unlock buttons. I thought this was all I needed to do, but now I'm not sure?! The key opens the door, starts the car, but won't remotely lock/unlock. Any ideas? also, the "master" key is missing. If I ever need s new key cut, what do I do? Is there someone I can contact now rather than when I lose my only functioning key!!?