VBA adding secondary axis error "object doesnt support this property or method"

So I am trying to add a secondary axis to the xyScatter plot but i keep getting an error stating objet doesnt support property or method

    ActiveSheet.Shapes.AddChart.Select
    ActiveChart.ChartType = xlXYScatter
    ActiveChart.SeriesCollection.NewSeries
    ActiveChart.SeriesCollection(1).Name = "='Sheet2'!$A$9"
    ActiveChart.SeriesCollection(1).XValues = "='Sheet2'!$B$9"
    ActiveChart.SeriesCollection(1).Values = "='Sheet2'!$C$9"

With Sheets(3).ChartObjects("Chart 8")
     .SeriesCollection(1).AxisGroup = xlSecondary     (Error Occurs here)
     .HasAxis(xlCategory, xlPrimary) = True
     .HasAxis(xlCategory, xlSecondary) = True
     .HasAxis(xlValue, xlPrimary) = True
     .HasAxis(xlValue, xlSecondary) = True
     .Axes(xlCategory, xlPrimary).CategoryType = xlAutomatic
     .Axes(xlCategory, xlSecondary).CategoryType = xlAutomatic
  End With

ActiveChart.SeriesCollection(1).Values = "='Sheet2'!$D$9"

Not sure why this is happening.