Object not moving according to the meshes..?

I have arranged 3 capsules in a chain form attached to each other with hinge joints. the first capsule has a fixed joint to a sphere. first capsule dosnt have gravity n other 2 re using gravity. When i play the scene nothing happens but if i select the capsule objects n then play the scene the meshes move according to the motion.

Can anyone please explain why the objects are not moving according to motion..?