ScreenSaver - Config from Context Menu

Hi,
I've now written quite a few screensavers and now want to address a minor
niggle that I've never been able to resolve ... when you right click a .scr
the context menu provides a configure option ... it should active the
screensaver config form but it my case it does nothing !  I've looked around
at lots of examples and other Delphi originated screen savers and none seem
to respond to this menu option.

What am I missing ?

Thanks

Andrew