'98 Lumina LS power door lock problem

My problem is that the keyless controller only opens the drivers door and if I press the manual lock/unlock button inside the car, it only works the drivers door also. The other three doors must be manually locked/unlocked. No blown fuses and the battery in the keyless is brand new. Any ideas or tips on where to start are appreciated. Thanks in advance.

will the keyless entry remote lock all doors? push the unlock twice in a row.