Isn't it a joy to own a french car

Does anyone know a solution to this problem...
I have a immobilizer problem with my misses Clio... Sometimes the car doesn't start (immo light flashing rapidly). I found a temporary solution: key to ignition, pos. 2, hold lock/unlock button on key, pos. 1, pos 2, release the button and then the car starts. Once it happened that it didn't start (I don't remember if maybe I messed up with the sequence). Luckily I had my CLIP diagnostic with me so I connected it and erased the fault (DF067) and the car started. I have a spare key and I tried it but the problems are the same.
I had the car computer to a specialist to remove the coded ignition but he said it can't be done with this computer...
EDIT: Image of the computer
