Changing Menu Caption

Hello!

I have the following code to create the menu:

    Set ControlView = CommandBars.ActiveMenuBar.Controls.Add(xtpControlPopup, 1, "File", -1, False)
    With ControlView.CommandBar.Controls
        Set Control = .Add(xtpControlButton, 2, "New", -1, False)
        .Add xtpControlButton, 3, "Open", -1, False
        .Add xtpControlButton, 4, "Close", -1, False
    End With

Then, later on I would lile to change the captions of the menu. For the main menu (File) I can change teh caption using:

    CommandBars.ActiveMenuBar.Controls.Item(1).Caption = "FileX"

But for it's submenus, I get "Invalid procedure call or argument" error message when I try this:
    CommandBars.ActiveMenuBar.Controls.Item(2).Caption = "OpenX"

What method should I use so that I can change the captions? Also, is the solution the same for toolbars?

Thanks in advance!

Rommel

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sorry, should have posted in VB area