Again i have problems with layout switching - this time in KNOPPIX 7.2
i used menu preferences>KDE system settings > input devices > keyboard > layouts
here i added new layout configure layouts is checked ,show layout indicator is checked
in advanced configure keyboard options is checked
in key(s) to change layout "left alt + left shift"is checked
apply is pressed
AND ...
No layout indicator is shown and pressing left alt + left shift does not change the layout
setxkbmap works but sets layout for the correct language but different from that i set in KDE system settings

i look back and i see this problem is here since version 6.2 and is not fixed yet!
So what it turns out ? KNOOPIX does not support keyboard layout switching ?
Can someone help me to make knoppix 7.2 switching layouts from GUI?
Thanks
Best regards