I watched this video SLAV, 3ds Max 2012, Kristen S21(9) and did what whas done there. I am using 3ds max 2010 SLAV to bring in the rig FBX 2011.3.1 Plug-in for 3ds Max 2011 64-bit and SL Viewer 3.0.3 (240895) to import to aditi test grid. Everything works as the video until I check Skin weights and the upload box dissapears.