programming excel combobox for autocomplete

[DarkPhoenix]

I am using a combo box and some VBA programming in conjunction with validation lists to create a very large list (100+ entries) that I can use autocomplete with. This way I can just type in the first few letters instead of searching through this large list. I had it set up and working just fine, now the auto complete part has stopped working. The combo box property Match Entry is set for fmMatchEnrtyComplete. here is the code I am using to tie the combo box in with the list

'==========================
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, _
  Cancel As Boolean)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Set ws = ActiveSheet
Cancel = True
Set cboTemp = ws.OLEObjects("CustomerCombo")
  On Error Resume Next
  With cboTemp
  'clear and hide the combo box
    .ListFillRange = ""
    .LinkedCell = ""
    .Visible = False
  End With
On Error GoTo errHandler
  If Target.Validation.Type = 3 Then
    'if the cell contains a data validation list
    Application.EnableEvents = False
    'get the data validation formula
    str = Target.Validation.Formula1
    str = Right(str, Len(str) - 1)
    With cboTemp
      'show the combobox with the list
      .Visible = True
      .Left = Target.Left
      .Top = Target.Top
      .Width = Target.Width + 5
      .Height = Target.Height + 5
      .ListFillRange = "" 'ws.Range(str).Address
      .LinkedCell = Target.Address
    End With
    cboTemp.Activate
  End If
  
errHandler:
  Application.EnableEvents = True
  Exit Sub

End Sub
'=========================================
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Set ws = ActiveSheet

Set cboTemp = ws.OLEObjects("CustomerCombo")
  On Error Resume Next
If cboTemp.Visible = True Then
  With cboTemp
    .Top = 10
    .Left = 10
    .ListFillRange = ""
    .LinkedCell = ""
    .Visible = False
    .Value = ""
  End With
End If

errHandler:
  Application.EnableEvents = True
  Exit Sub

End Sub
'====================================
'Optional code to move to next cell if Tab or Enter are pressed
Private Sub CustomerCombo_KeyDown(ByVal _
        KeyCode As MSForms.ReturnInteger, _
        ByVal Shift As Integer)
    Select Case KeyCode
        Case 9 'Tab
            ActiveCell.Offset(0, 1).Activate
        Case 13 'Enter
            ActiveCell.Offset(1, 0).Activate
        Case Else
            'do nothing
    End Select
End Sub
'====================================

The main spreadsheet is on sheet 1 while the list data is kept on sheet 3, if that makes any difference. I would like to keep it this way because, due to all the formatting I have on sheet 1, it makes it easier to manage and update the list data if it is kept on a seperate sheet.

Any ideas?