Command Bar show/hide/delete

[lisamariechemistry]

Quick question:

I have a custom command bar that I want to show always and only with a
specific worksheet in a specific workbook.

In "This Workbook" macro area I have

Private Sub Workbook_Activate
Application.CommandBars("MyCommandBar").Visible = True
End Sub

Private Sub Workbook_Deactivate
Application.CommandBars("MyCommandBar").Visible = False
End Sub

Private Sub Workbook_BeforeClose(Cancel As Boolean)
Application.CommandBars("MyCommandBar").Delete
End Sub

(I also have visible true/false to activate and deactivate the sheet,
but that is not where I seem to be having trouble)

Upon closing the workbook I get an error message: "Invalid Procedure
Call or Argument" that goes to the workbook_deactivate code when I hit
"debug".

But if I delete that part out then I can still see the command bar
upon opening (and activating) another workbook, although the error
message is gone. Help?