For the moment i pulled out the plug (I donno what they call it) of the LEFT REAR DOOR which connects the module at the bottom of the door and locked the LRD manually. All the other three doors locks properly when i press the remote now and the auto lock does work when i cross 20KM speed. Come on guys please help me....which part is gone kaput! So do i need to change the door switch. Is that what i need to tell them?