Using 'sudo' in desktop launchers on FC6

[Edward Diener]

I have given my own username sudo priveleges in the /etc/sudoers file to 
execute commands without having to specify a password. If I run 'sudo 
someCommand...' from a terminal, this runs properly. If I create a 
desktop launcher, and specify 'sudo someCommand...' as the Command 
nothing happens when I try to run the launcher. Does anybody know why 
sudo does not work in that situation ?