Hello everybody ! Thank you for your help and sorry for my late answer...
Everything works with rytec.channels.xml-cable.gz and XMLTV. Thank you doglover. I didn't remember which FTP client I used to transfer the conf but I didn't had any problem at that time. Thank you clouditaly for the explanation.
But there are 4 or 5 channels that have the wrong EPG. I will tell you as soon as I'm back home. Thank you again.