Does the red LED light up on the key when you press lock or unlock and have you tried to re-register them? See this link. Does the boot open using a transmitter?
Registering Keyless Entry Transmitters NB & NC
Shut all doors and remove key from the ignition switch
Open drivers side door
Insert key into ignition, switch ignition on and off 3 times.
Close then open drivers door 3 times (all doors should lock then unlock)
Press unlock button twice on the transmitter (doors lock then unlock to confirm)
Press unlock button twice on all other transmitters to be registered to the car (doors should lock and unlock to conform each transmitter registered)
Switch …