Cannot get to export Opacity map

[tokola]

I'm struggling to export the opacity of a map, following the instructions here. I am not sure why it gives me such a hard time, but no matter what I've tried, I cannot get the alpha in Vizard (or the Inspector). I am not sure if I need to use the vizfx.addChild(), but in the past I've used texture alpha exported from Max with no problem (simply with viz.add()).

Am I missing something very simple? (please, see attached files). Weirdly enough the map (Map0.tga) does not have any alpha information. But even when I added it with Photoshop, it still is ignored by Vizard.