Hello, I hope the following assists you.
To reprogramme the remote fob is as follows.
Switch the ignition on and off 6 times within 10 seconds, leave the key in the ignition,
after 2 seconds the indicators should flash twice this means programming mode is active for 2 minutes.
Press and hold the unlock button, press the lock button 3 times, release the unlock button, the indicators should flash once to confirm programming, do this for any other remote fobs, up to 4 can be programmed.
Switch the ignition on, indicators should flash twice for 1 to 3 fobs programmed, programming complete.
The above is for the remote locking, the immobiliser can only be programmed using diagnostic equipment.
Let me know if I can advise further.