Building a menu bar for Excel using a VB6 DLL

I have built a DLL using VB 6.0. One of the functions of the DLL is to build a custom menu bar in Excel. I have setup a class with the necessary code to create the menu and it appears to work properly. However, the menu options are not built in the currect version of Excel. Rather, they only appear when I open up Excel from scratch.

My logic in Excel to call my DLL is as follows:

VB Code:

Private Sub Workbook_Open()
   
  Dim objMenu         As Object
   
  Set objMenu = CreateObject("adcxxx.clsMyClass")
  
  objMenu.Add_Menu_Options   
 
End Sub--------------------------------------------------------------------------------My DLL contains the following logic:
visual basic code:--------------------------------------------------------------------------------Sub Add_Menu_Options()
 
    Dim intHelpMenu             As Integer
    Dim cbrMainMenuBar          As CommandBar
    Dim cstmMyMenu                As CommandBarControl
    Dim menu                    As CommandBarControl
    
    ' Remove the Ellipse menu option if it already exists
    On Error Resume Next
    Application.CommandBars("Worksheet Menu Bar").Controls("E&llipse").Delete
    On Error GoTo 0
 
    ' Set a CommandBar variable to Worksheet menu bar
    Set cbrMainMenuBar = Application.CommandBars("Worksheet Menu Bar")
 
    ' Return the Index number of the Help menu. We can then use this to place a custom menu before.
    intHelpMenu = cbrMainMenuBar.Controls("Help").Index
      
    Set cstmMIMS = cbrMainMenuBar.Controls.Add(Type:=msoControlPopup, Before:=intHelpMenu)
    cstmMIMS.Caption = "My Menu"
      
    With cstmMyMenu.Controls.Add(Type:=msoControlButton)
         .Caption = "ERP Connect"
         .OnAction = "ERP_Connect"
    End With
  
End Sub

--------------------------------------------------------------------------------Any help would be appreciated. Thanks - Joe