I have a 2000 range rover 4.0 se (US). I only have 1 key for the truck and no key fob(bought it this way).I locked my truck about a week ago and when i returned to unlock it, opened the door and the alarm started to go off so i shut the door and re locked the truck, shutting the alarm off. every time i open the door the alarm will go off though. Turning the key in the door only unlocks the driver door. If i keep the key in the door lock while opening the door and when the alarm sounds I can turn the key either way and get the alarm to quit, as soon as I try to start struck alarm goes off again. While in the truck I tried to unlock passenger door with the sill lock and it acts like it is not connected to anything. Any help would be super great. I have read countless articles about similar problems but have not helped me.