Question : Change MSGraph Chart Type

I have an Access 2003 app that displays MSGraph charts.  The chart type as defined on the form is an XY Scatter.

I need to change it dynamically between an XY Scatter and a Bubble 3D.  (I know I will have to manipulate the DataSheet that supports the chart.

If the chart is originally defined as a Bubble 3D, and I want to change it to an XY Scatter, then this code works:
GraphObj.ChartType = xlXYScatter

If, however, the chart is originally defined as an XY Scatter, and I want to change it to a 3D Bubble, then this code does NOT work:
GraphObj.ChartType = xlBubble3DEffect

In addition, if it starts as an XY Scatter, and I change it to a 3d Bubble, I cannot change it back.  In fact, the chart type is permanently changed on the form.

How can I change it programmatically between an XY Scatter and a 3D Bubble?

Answer : Change MSGraph Chart Type

are you executing the codes in the form where the chart is?