Saving Excel with ActiveX controls

[Roopa]

Hi,

I have some custom activeX controls. I am able to add these controls in
Excel (2000) using Control toolbar and they work fine. But when I try to save
the Excel file along with these controls, I get the following message.
"Microsoft Excel cannot save this workbook because the control named
QIChartControl1 does not support saving. To save the workbook, delete this
control and then try save again".

I tried saving Excel file by deleting just the above control and it worked
fine.
Any ideas on what could be wrong with the above Activex control?

Thanks.