Level of Detail (LOD)?

I hope this is my last question. When I try to setup additional levels of detail for my models in T3D, It looks in the text display like it works, how every when I slide the slider in the advance properties window, only one LOD displays, and the others are empty, with a 0 poly count. Does this not work? Or am I doing it wrong? Can someone either point out the right post that discusses this, or tell me what's up?