Selecting a point on a chart in Excel 2007 on Windows 7

[Kirill]

Hi,

I have a macro that operates on a point, selected on a chart. It works fine
in Excel 2003 on Windows XP, Windows 7, and in Excel 2007 on Windows XP.
However, I can't seem to select a point by clicking on it in Office 2007 on
Windows 7.

Sometimes when I select the chart *some* point gets selected, but I can't
change that selection either by clicking on another point or by using the
keyboard (both ways work fine in Excel 2003).

Is there a way to *reliably* select a point on a chart in Excel 2007?

Thank you!