synaptic starting in console not from menu

[L . V . Gandhi]

I have installed sarge r1 starting with base install and then using
apt-get kdebase, x-window-system-core, synaptic etc. After correcting
sudoers file for env, I could start synaptic from konsole. But when I
click synaptic in menu nothing happens. How to get it work?
Is it some program in kde which can ask for root password for starting
synaptic not installed by me?
--
L.V.Gandhi
http://lvgandhi.tripod.com/
linux user No.205042