Betta Macrostoma

I had bought a pair of Betta Macrostoma (aka Macs) in early 2011. The color of the male is striking red with a patch of black at the mouth. The female was drab in color, not much color on her body. I fed them with Tetrabits(TM) . While the female eats it with no problem the male just munch it then spit it out. I wonder how it can live until now although sometimes it will eat insects and mosquito larvae. I saw it spawn twice now but no baby have been observe. Still hoping for an answer how to make it breed.