I can't get the weight paint to work?
i am in weight paint,i have the bone selected, and it doesnt let me paint. am i doing something wrong with the vertex groups?
The bone wont be connected to the mesh that you are attempting to paint - that's why. otherwise it would work, or perhaps it isn't connected in the correct fashion.
if it moves: it's connected. ( it probably is )
attempt the same thing on other meshes, delete the bone - re-add it. try things that would usually fix a computer:
Turn it on + off ( delete it and re-add it ) Try on other meshes.
If you look at the image you posted, at the top left corner, on the tools panel, you have weight set at zero. It has to be above zero to be able to weight paint.