Macro Excel VBA : graphiques automatique

bjr, j'ai 1 macro qui génère automatiquement des graphes/graphiques, ça marche.
Mais, 1 fois le graphe créé, sur une boucle, je n'arrive pas à reprndre le graphe pour modifier le style de la courbe, quelqu'un connait-il la solution ?
Merci.

[code]
Sub ifcourbes()

'
' ifcourbes Macro
' Macro enregistrée le 12/02/2007 par ericE
'
Sheets("tableau").Select
Range("AN6").Select

'maxlig = Range("B65535").End(xlUp).Row
maxlign = 6

For i = 2 To maxlign
'Sheets("tableau").Select

recup = Cells(i, 35)

If Cells(i, 31) < 500 Then
'Sheets("tableau").Select

Select Case recup
Case ""
Cells(i, 42) = "tropfort"
Case Is > 0.7
Cells(i, 42) = "vu1"
Case 0.6 To 0.7
Cells(i, 42) = "vu11"
Case Is < 0.6
Cells(i, 42) = "vu121"
End Select

Else

Select Case recup
Case ""
Cells(i, 43) = "nonvu"

Case Is > 0.7
appelfonction = casfort(i)

Case 0.6 To 0.7
Cells(i, 43) = "vu11"
Case Is < 0.6
Cells(i, 43) = "vu121"
End Select
End If

Next

Range("AN6").Select

End Sub

Function casfort(j) As Integer
'Public ChartList As Integer
Dim sha As ChartObject

maxlign = 5
m = 1

For j = 2 To maxlign

'k = j + 22
Sheets("fort").Select
Cells(j * 22, 1).Select
'Cells(j * 25, 1).Select
'Cells(j * 22, 1).Select
Charts.Add

'ChartList = ActiveSheet.ChartObjects.Count
'm = ChartList * 15

'ActiveChart.ChartType = xlLine
'ActiveChart.ApplyCustomType ChartType:=xlBuiltIn, TypeName:= _
"Courbes à deux axes"
ActiveChart.SetSourceData Source:=Sheets("tableau").Range("A1:AM123"), _
PlotBy:=xlRows

ActiveChart.SeriesCollection.NewSeries
'Sheets("tableau").Select
ActiveChart.SeriesCollection(1).XValues = _
"=(tableau!R1C3,tableau!R1C4,tableau!R1C6,tableau!R1C8,tableau!R1C10)"

'k = j + 1

'lignier2 = "=(tableau!R" & j & "C3," & "tableau!R" & j & "C4," _
& "tableau!R" & j & "C6," & "tableau!R" & j & "C8," & "tableau!R" & j & "C10)"

lignier1 = "=(tableau!R" & j & "C3," & "tableau!R" & j & "C4," _
& "tableau!R" & j & "C6," & "tableau!R" & j & "C8," & "tableau!R" & j & "C10)"

lignier2 = "=(tableau!R" & j & "C5," & "tableau!R" & j & "C7," _
& "tableau!R" & j & "C9," & "tableau!R" & j & "C11," & "tableau!R" & j & "C13)"

'title2 = "=(tableau!R" & j & "C1," & "tableau!R" & j & "C2"
valide1 = Sheets("tableau").Cells(j, 1)
validier = Sheets("tableau").Cells(j, 2)
valide = valide1 & " " & validier

ActiveChart.SeriesCollection(1).Values = lignier1
ActiveChart.SeriesCollection(1).Name = "=""Em"""

'ActiveChart.ApplyCustomType ChartType:=xlBuiltIn, TypeName:= _
"Courbes à deux axes"
ActiveChart.SeriesCollection(2).Values = lignier2
ActiveChart.SeriesCollection(2).Name = "=""Energie"""

ActiveChart.Location Where:=xlLocationAsObject, Name:="TBpforte"

ActiveChart.ApplyCustomType ChartType:=xlBuiltIn, TypeName:= _
"Courbes à deux axes"

Sheets("TBpforte").Select
ActiveChart.PlotArea.Select
'ActiveChart.ChartType = xlLine

ActiveWindow.Visible = False

With ActiveChart
.HasTitle = True
.ChartTitle.Characters.Text = valide
.Axes(xlCategory, xlPrimary).HasTitle = True
.Axes(xlCategory, xlPrimary).AxisTitle.Characters.Text = "mois"
.Axes(xlValue, xlPrimary).HasTitle = True
.Axes(xlValue, xlPrimary).AxisTitle.Characters.Text = "KW"
.Axes(xlCategory, xlSecondary).HasTitle = False
.Axes(xlValue, xlSecondary).HasTitle = False
End With

With ActiveChart.Axes(xlCategory)
.HasMajorGridlines = False
.HasMinorGridlines = False
End With
With ActiveChart.Axes(xlValue)
.HasMajorGridlines = True
.HasMinorGridlines = False
End With

ActiveChart.HasDataTable = False
ActiveChart.Axes(xlCategory).Select
ActiveChart.Axes(xlValue).Select

ActiveChart.PlotArea.Select

ActiveChart.SeriesCollection(2).Select
With Selection.Border
.Weight = xlThin
.LineStyle = xlAutomatic
End With
With Selection
.MarkerBackgroundColorIndex = xlAutomatic
.MarkerForegroundColorIndex = 46
.MarkerStyle = xlDiamond
.Smooth = False
.MarkerSize = 5
.Shadow = False
End With
With Selection.Border
.ColorIndex = 46
.Weight = xlThin
.LineStyle = xlContinuous
End With
With Selection
.MarkerBackgroundColorIndex = 46
.MarkerForegroundColorIndex = 46
.MarkerStyle = xlDiamond
.Smooth = False
.MarkerSize = 5
.Shadow = False
End With

Sheets("tableau").Select

Next

Sheets("fort").Select
Range("A1").Select
'Rows("1:15").Select
Rows("1:30").Select
Selection.Delete Shift:=xlUp
'Range("A1").Select
Columns("A:B").EntireColumn.Delete
'Columns("A:C").EntireColumn.Delete

End Function

[/code]

msg : "La méthode Select de la classe Axis a échoué."

ActiveChart.Axes(xlCategory).Select à déboder

pb : "ActiveChart.PlotArea.Select" ne marche pas sur une boucle
pour 1 seule courbe, c'est OK, sinon, non sur une boucle !

quelqu'un sait-il ?

Merci
Techneric