Why is my Caps Lock not working as Ctrl?

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http://askubuntu.com – I am on a Lenovo W500 with German keyboard layout. I use Ubuntu 12.10 and have configured my keyboard layout to use the Caps Lock as Ctrl. But it does not work. I even tried to reboot my system. Here is the configuration of my "Keyboard Layout". My goal is to have Caps Lock and Left Ctrl as Left Ctrl plus the Right Ctrl as Right Ctrl. (HowTos)