bone envelope doesn't move vertices inside it.

I can’t figure out how to use the envelope-type bone visualization. I thought it was supposed to influence vertices within it, but it doesn’t. It did seem to work with one mesh, but now it doesn’t. The rotation of the bone, as parent, will influence a child object in pose mode, but changing the size/“weight” of the envelope seems to have no effect at all. What am I missing?

It seems to be working now. I don’t know what the problem was. . .