FORMAT CHART ACCESS BY SERIESCOLLECTION FAILED WHY???

[alec77]

Hi,
I use this code related to Update Event:

Private Sub GRAPH_ALL_Updated(Code As Integer)
Dim MyChart As Object
Set MyChart = Me!GRAPH_ALL.Object.Application.Chart
MyChart.SeriesCollection(1).DataLabels.NumberFormat = "#,###,##0"

End Sub

The error message says "IMPOSSIBLE SET NUMBER FORMAT PROPERTY FOR
DATALABELS METHOD"

Why?
tks
Alex