Hey, thank you for your answer!
So i duplicated every timeline that leaded to several menu. When i play entirely every timeline, no problem, at the end it goes to the right button/menu i assigned to it. But the problem remains when i push "top menu" on the remote control, it still going back to the first menu of the disk (i fact it sounds logic as the button is named "top menu". On my remote control i have four buttons: "top menu", "pop up/menu" "options" "return". the three last ones have abolutly no effects... I'm really desperate i admit...