I'm running Redhat 5.6 with the gnome display manager. I would like to configure the login manager so that there is no echo of the password when typing it in (no asterisks or the like). I have edited the files `/usr/share/gdm/defaults.conf` and `/usr/share/gdm/factory-defaults.conf` and changed the line

`#UseInvisibleInEntry=false`

to 

`UseInvisibleInEntry=true`,

but I still get a password echo of asterisks at the login screen.