ALT GR + <key> doesn't work

[Paolo Pantaleo <paolopantaleo@gmail.com>]

In italian keyboard layout to generate @ and some other chars you need to use
ALT GR + some other key.

Now on my Debian stable it is not working, i installae it few days
ago, th problem is present only in X server (XFree86 obviusly). My
XF86Config-4 file contains this:

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "keyboard"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xfree86"
        Option          "XkbModel"      "pc105"
        Option          "XkbLayout"     "it"
        Option          "XkbVariant"    "it"
EndSection

any idea about how to solve the problem?

Thnx
PAolo