Comment conditioné une macro excel selon heur

Bonjour,

Je cherche une solution pour déclencher selon une heure précise une macro excel sans que le fichier soit ouvert?
J'ai essayé plusieurs solution sans succés.
De plus je ne veux pas passer par autre moyen car ce fichier sera heberger sur un serveur dans une page web.
Voila les quelques lignes que j'ai créé et qui ne font .......RIEN, sauf l'envoi du mail en manuel!!!

Sub Lancer_Heure()

Application.OnTime "03:11:00", "Mail_ActiveSheet"

End Sub


Sub Mail_ActiveSheet()
'Working in 97-2007
Dim FileExtStr As String
Dim FileFormatNum As Long
Dim Sourcewb As Workbook
Dim Destwb As Workbook
Dim TempFilePath As String
Dim TempFileName As String

With Application
.ScreenUpdating = False
.EnableEvents = False
End With

Set Sourcewb = ActiveWorkbook

'Copy the sheet to a new workbook
ActiveSheet.Copy
Set Destwb = ActiveWorkbook

'Determine the Excel version and file extension/format
With Destwb
If Val(Application.Version) < 12 Then
'You use Excel 97-2003
FileExtStr = ".xls": FileFormatNum = -4143
Else
'You use Excel 2007, we exit the sub when your answer is
'NO in the security dialog that you only see when you copy
'an sheet from a xlsm file with macro's disabled.
If Sourcewb.Name = .Name Then
With Application
.ScreenUpdating = True
.EnableEvents = True
End With
MsgBox "Your answer is NO in the security dialog"
Exit Sub
Else
Select Case Sourcewb.FileFormat
Case 51: FileExtStr = ".xlsx": FileFormatNum = 51
Case 52:
If .HasVBProject Then
FileExtStr = ".xlsm": FileFormatNum = 52
Else
FileExtStr = ".xlsx": FileFormatNum = 51
End If
Case 56: FileExtStr = ".xls": FileFormatNum = 56
Case Else: FileExtStr = ".xlsb": FileFormatNum = 50
End Select
End If
End If
End With

' 'Change all cells in the worksheet to values if you want
' With Destwb.Sheets(1).UsedRange
' .Cells.Copy
' .Cells.PasteSpecial xlPasteValues
' .Cells(1).Select
' End With
' Application.CutCopyMode = False

'Save the new workbook/Mail it/Delete it
TempFilePath = Environ$("temp") & "\"
TempFileName = "Part of " & Sourcewb.Name & " " _
& Format(Now, "dd-mmm-yy")

With Destwb
.SaveAs TempFilePath & TempFileName & FileExtStr, _
FileFormat:=FileFormatNum
On Error Resume Next
.SendMail "ludovic@.com", _
"planning_hebdo"
On Error GoTo 0
.Close SaveChanges:=False
End With

'Delete the file you have send
Kill TempFilePath & TempFileName & FileExtStr

With Application
.ScreenUpdating = True
.EnableEvents = True
End With
End Sub