Hello
I have found the origin of the problem. I have deleted a page and create another one with the same name. I thought it would be like in Dreamweaver : the links would work with the new page. Well, it does not. So, I deleted the old page “accueil” in my menu and insert the new one. Now, it works fine.
Thank you.
PS : A suggestion for the forum : it would be usefull for us, clients, to have the possibility to edit or remove all the time our messages or even sometimes a whole post because we may have found a solution by ourselves before you have the time to answer, or see that our message was not necessary…By doing so, maybe a little less work for you ?