Table Cell's Shape.Fill.Visibile property not working in PowerPoint 2010

Hi,

I am facing an issue w.r.t Office 2010 migration(from Office 2007).

For PowerPoint tables, the table.cell(1,1).Shape.Fill.Visible property is not working in Office 2010 while it works for Office 2007

I had a look at "transparency", but if transparency is set to 1 then the color change will not be visible to the user.

Is there any way to achieve this in PowerPoint 2010?

snippet: table.cell(1,1).Shape.Fill.Visible =msoTristate.msoFalse (works for office 2007 but not 2010)