I havent looked inside the vx door panel so I cant swear to it, but on most cars if you can hear the lock/unlock motor engaging its fine. Most cars dont have "gears" in the lock/unlock motors they are a simple plunger type motor. Chances are, one of the plastic clips that hold the metal rod has broken or popped off.
"You can live your life in a thousand ways,
but it all comes down to that single day,
when you realize what you regret,
but you cant relaim and you cant forget."
----Trans Siberian Orchestra