Radiosity "regather indirect illumination" parameter has no effect on final render

[boris.b500]

Hi,

I'm on 3DS Max Design 2010 (win XP Home).
I work with an AA2010 object linked in 3DS.
I use radiosity with architectural textures.

Why the "regather indirect illumination" parameter in the render parameter of radiosity do not have any effect on final render when switched on?

When I was on VizRender 2007, this parameter was very efficient...the rendering time was much longer and the final render was very good.

Is it a bug ?
Or is it an other setting which activates the "regather indirect illimination" parameter ?

Thanks guys if you can help me.