door lock problem

hope i explain myself completely and clearly,, my door locks work with the van on and the key in the 'on' position. When the key is in the "off" or accessory position the door locks don't work. When the van is on i can hit the lock unlock buttons on the remote and it works fine, when off and i hit the buttons nothing happens can anyone help ? thanx

would you believe that I have the same problem?
Any solutions yet?