ToolButtons not 3d when down=true and flat=true

I have a Coolbar/Toolbar/Toolbutton that is of type tbsButton. If the
"flat" of the toolbar is true, and the toolbutton is "down"... then I
don't get the 3d depressed look to the button. It just has the light
gray "shading". IOW, it doesn't look like the D3 toolbar when you
select a component on the toolbar (depressed 3d look).

Any ideas?

Regards, Mike