Hi, A week ago, my remote control stopped working completely so i changed the battery and it didn't do nothing at all,but i was still able to activate the alarm and lock all doors with the key though. However,after a couple days,I could'nt activate the alarm and lock all doors with my key. So now I have a big problem and I think it's the central locking pump. Is it possible it is the problem? Please get back to me as soon as possible and it will be greatly appreciate.