Passive key entry

Hi all

I have an 1993 anniversary C4. I have followed the instructions for setting the passive key feature .Which is to to put the transmitter 10 feet or more away from the car turn the ignition on, push the trip/Odo button twice ,within five seconds push and hold the fuel info button until the PKE light is on . This all works you’re supposed to turn the ignition off and the light starts to flash and it doesn’t it just goes off. Is there anyone got any idea what I may be doing wrong? ( brand new battery in fob )
Thanks Pete
 
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