Cannot set Marker properties in MSChart

[szamkow]

I am unable to set the Marker properties on an MSChart control. The following code section runs without error, but .Size remains as 240 and the .Style remains as vbMarkerStylePlus

'------
With MSChart.Plot.SeriesCollection(1)
.SeriesMarker.Show = True
.ShowLine = True
.Pen.Width = 1
.DataPoints.Item(-1).Marker.Size = 50
.DataPoints.Item(-1).Marker.Style = VtMarkerStyleFilledCircle
End With
'---------

Any ideas on what may be defaulted somewhere or what might cause these values to refuse to set properly?

TIA,

Stan