adding menuitems

[Jeff]

hey

asp.net 2.0

I want to add a menu item to a menu on my webpage programatically. I've
tryed using the code below, but it doesn't add the menu item to the menu.

MenuItem menuItem = new MenuItem("Menu item text", "menuitemvalue",
"imageurl", "navigateurl");
Menu menu = (Menu) lvSidebar.FindControl("mnuSidebar");
menu.Items.Add(menuItem);

About my code:
lvSidebar is a Loginview
mnuSidebar is placed within the LoggedInTemplate
"MenuItem menuItem = new MenuItem("Menu item text", "menuitemvalue",
"imageurl", "navigateurl");", works
"Menu menu = (Menu) lvSidebar.FindControl("mnuSidebar");" works, FindControl
finds the mnuSidebar

Any suggestions to why my code don't add a menu item the web page?

Jeff