Headwind A330-900 tail number issue

Hello everyone !

I have created a livery for my VA.I expected each pilot could generate their tail (and wing) numbers in MSFS flight configuration panel, so I don't have to create a livery for each aircraft registration. But it doesn't work and I can't figure it out. Does anyone have a solution for that ?

aircraft.cfg code :

[VERSION]
major = 1 ; 
minor = 0 ; 

[VARIATION]
base_container = "..\Headwind_A330neo"

[FLTSIM.0]
Title="Airbus A330-900neo Knight2"
Model=""
Panel=""
Sound=""
Texture="KE2"
KB_Checklists="Boeing747-400_check"
KB_Reference="Boeing747-400_ref"
description="Airbus A330-900neo Knight Aviation Airlines"
wip_indicator=0
ui_manufacturer="Airbus"
ui_type="A330-900 KE-008P"
ui_variation="KE"
ui_typerole="Commercial Airliner"
ui_createdby="Heawind"
ui_thumbnailfile=""
ui_certified_ceiling=41450
ui_max_range=7200
ui_autonomy=15
ui_fuel_burn_rate=5300
atc_id=""
icao_airline="KAA"
atc_id_enable=1
atc_airline="Knight"
atc_flight_number="08P"
atc_heavy=1
atc_id_color=""
atc_id_font=""
isAirTraffic=0
isUserSelectable=1
isFlyable=1
Effects=""
atc_parking_types="GATE,RAMP"
atc_parking_codes=""

Thanks for help.