I had the same problem a few months ago with my 2000 Venture power sliding door. It closed just fine, but the unlock mechanism inside the door didn't always unlock, so the door will "click" when you try to open it, but will not budge because it was still locked. Check to see if the tab button goes all the way up on the door panel when you press the unlock button on your keyfob. If it doesn't, try to press/wiggle it upward until it unlocks, then the door should open. Any of this work for you?