kdesudo - sudo

When I right click a file and choose 'edit as root' I get the error 'Command not found!', but 'kdesudo' is installed. I'm unable to run 'filemanager superuser' from the menu or start it from the run command or from the console. I'm unable to run 'kuser' from the menu or start it from the run command or from the console. sudo: kcontrol: command not found jimmy@jimmy-1:~$ sudo konqueror sudo: konqueror: command not found jimmy@jimmy-1:~$ sudo kuser sudo: kuser: command not found jimmy@jimmy-1:~$ kdesu kuser /usr/bin/xauth: (argv):1: couldn't query Security extension on display ":0.0" sudo : kuser: command not found jimmy@jimmy-1:~$ kdesu konqueror /usr/bin/xauth: (argv):1: couldn't query Security extension on display ":0.0" sudo : konqueror: command not found jimmy@jimmy-1:~$ kdesu kcontrol /usr/bin/xauth: (argv):1: couldn't query Security extension on display ":0.0" sudo : kcontrol: command not found jimmy@jimmy-1:~$ -- Jimmy Johnson Debian Squeeze Trinity 3.5.11 at sda12 Registered Linux User #380263