I cannot lock it using a remote, as it don't have one!!!,(with the door closed and it seems to be square in the opening, and no drop on the hinge), when I turn the key all that happens is the key turns 90 degree either left or right without doing anything to the lock mechanism, but with the door fully closed, from the passengers side I can reach across and push the door plunger down, and this then locks the central locking on all closed doors, and I can then lock the passengers door using a key from the outside, but this will not operate the central locking from this door ???????