Can't add a new menu

Hi,

(FM10, Win XP)

Following the example in the scripting guide to add a menu with ES, I just can't get it to work. I expect the menu to appear after I run the script, which it does when I run the equivalent with the FDK. What am I missing here?

var fmMainMenu = app.GetNamedMenu("!MakerMainMenu") ;

var newMenu = fmMainMenu.DefineAndAddMenu("MyMenu1", "MyMenu1");

I tried adding a command to the menu and get no errors, but the new menu still does not appear.

Thanks,

Russ