casting shadows on objects?

i am having problems with shadows casting shadows on other objects in the scene. shadows are cast on the object itself but not on the objects they interact with.

i have the shadow button pressed in the shaders column but that is not working.

You may be using a hemi type lamp, which does not cast shadows. If that’s the case, switch to another lamp type, and you should get your cast shadows. (Of course, there is a lamp shadow button that must be pressed in the lamp’s Shadow and Spot panel, and, if the lamp uses ray traced shadows, the material must have the “Tracable” button pressed in the material’s Links and Pipeline panel)

Also, the shadow button must be pressed for the material receiving the shadow.