tails live usb, problem with french locale

This is my first linux distribution, I like this one because I can use it on any computer with live usb.

Problem is I cant make those characters ?./§%µ¨£1234567890°+, on a french keybord you use majLock or shift and the press a key in order to make those. However shift+key will only print the regular character.

shift is working since I can make < and > (> is done with shift+<).

I have no idea what to do. could you help me out?