1996 Power Door Switch

I need some help otherwise im going to have to take it in to the shop! My wifes 1996 Camry power door lock switch on the drivers side unlocks all the doors but wont lock them all. The passengers side will lock them all and unlock them all! I changed the master power switch unit at a cost of $350 still lock button doesnt lock! Are they more than 1 relay on these cars? Possible wiring issues? anyone have any experience with this? Please i ask of you to help!