System Error ?!

Hi,
i have this problem...
after i install my program on a "clean" system, an error has occur after i press a "Open Button" on my program.
(ActiveX component can't create object(429))

"Open Button"

Code:

---

Private Sub cmdOpen1_Click()
On Error GoTo Error_Handler
  Dim strFileNames As Variant
  Dim i As Integer
  strFileNames = Split(GetFiles, Chr(0))
  With List1
    If UBound(strFileNames) > 0 Then
      Preview1.Caption = strFileNames(0)
      For i = 1 To UBound(strFileNames)
        List1.AddItem strFileNames(i)
          Next
    Else
        .AddItem strFileNames(0)
    End If
  End With
 
  With List12
    If UBound(strFileNames) > 0 Then
        Preview1.Caption = strFileNames(0)
      For i = 1 To UBound(strFileNames)
        List12.AddItem strFileNames(0)
          Next
    Else
      .AddItem ""
    End If
  End With
 
Error_Handler:
Resume Next
End Sub

Public Function GetFiles(Optional ByVal sTitle As String = "Open files...") As String
  Dim sFilenames As String
  Dim cdlOpen As Object
  On Error GoTo ProcError
 
  Set cdlOpen = CreateObject("MSComDlg.CommonDialog")
  With cdlOpen
        .CancelError = True
    .Filter = "All Supported files (*.dat;*.avi;*.mp3;*.wav;*.mpg;*.wma;*.rmvb;*.m2p;*.wmv;*.mov;*.divx)|*.dat;*.avi;*.mp3;*.wav;*.mpg;*.wma;*.rmvb;*.m2p;*.wmv;*.mov;*.divx"
    .FilterIndex = 1
    .DialogTitle = sTitle
    .MaxFileSize = &H7FFF
    .flags = &H4 Or &H800 Or &H40000 Or &H200 Or &H80000
    .ShowOpen
    sFilenames = .FileName
  End With
ProcExit:
  GetFiles = sFilenames
  Set cdlOpen = Nothing
  Exit Function
ProcError:
  If Err.Number = &H7FF3 Then Resume Next
  MsgBox Err.Description & "(" & Err.Number & ")", vbExclamation, "Open error"
  sFilenames = ""
  Resume ProcExit
End Function

---

I have this file in my program..
ActiveX Control:
MSCOMCTL32.OCX
Comdlg32.ocx
MSCOMTL.OCX
COMCTL32.OCX

can some one tell me how to solve it?

Is this happening on every machine you install on or just one or two?

yes, every machine..