Reprogram 406 remote door locking?

My 406 HDi (2002) had some work earlier this week which involved
disconnecting the battery. After this I found that the remote door locking
no longer works. I know it's a relatively easy job to re-register the key
with the car locking control sensor thingy because I've seen it done.

I found some instructions on how to do it here:
http://www.programyourkeys.com/Peugeot_406_Reprogramming_Key_Remote_Control_Plip_Instructions.html
but they don't seem to have done the job.

(We've only got one remote key and it has one big button for 'lock' and
another, smaller one, for 'unlock' and no LED. So I unlocked the car
manually, turned on the ignition, pressed the big 'lock' key once and then
pressed it again. Turned off ignition. No joy with remote locking the car,
although at least it starts ok).

Are these instructions correct or am I missing something? (Have you got to
hold the button for x seconds and say a magic spell or something?)

Thanks in advance,

- Pete

ps - changed the key battery only a couple of months ago, so it's not that.

pps - I don't seem to be the only one with this problem
(http://www.usedcarmart.co.uk/forum/archive/index.php/t-5704.html)

 

I've got a 2001 Hdi 406 and about 3yrs ago I changed the battery in the key fob and when I came to use it, the central locking wouldn't work.
I phoned the local Peugeot dealers and they said my key needed programming and it would cost £38.
I googled the the problem and if memory serves me right, all I did was - turn ignition on without starting the car and hold in the large button on fob for 15sec. Release the button. Turn ignition off and then back on and start the car.
Worked for me and I was £38 better off.

 

On mine I switched ignition to accessory, press large button then the small one and it worked.
Have now done this a number of times due to an airbag fault I still have.

See post below.