Erreur 1004 avec range multiple

Public Function calcule_Lxx(fractile As Long, zone1 As Range, Optional zone2 As Range = Nothing) As Double
    ''' Renvoie le niveau fractile.
    If Not zone2 Is Nothing Then
        calcule_Lxx = Application.WorksheetFunction.Percentile_Inc(ActiveSheet.Range(zone1.Address & ";" & zone2.Address), 1 - fractile / 100)
    Else
        calcule_Lxx = Application.WorksheetFunction.Percentile_Inc(zone1, 1 - fractile / 100)
    End If
End Function