Modifying DefaultPageSetting at runtime for LocalReport -- HELP! --

[Rod]

I'm using:

Microsoft.Reporting.WinForms.ReportPageSettings pgSettings = reportViewer1.LocalReport.GetDefaultPageSettings() ;
pgSettings.Margins.Right = 40;
pgSettings.Margins.Left = 40;

... to set my page margins for the report, but when I click the page setup, it still shows 100 (1 inch).
Can anyone explain this and offer a solution? I don't want the end users to have to set the margins
each time before printing.

Thanks!