Sorry I've made a mistake... I had not verify my parameters and now all is ok (I think they had been reseted after night mode v9 update) !
The post is here :
https://www.mobileread.com/forums/sho...09#post2755809
Great thanks for your help and for your quick answer PeterT ! If you come in France let me know, I will put 2 beers in the fridge

!!!