Shadow not being casted right

As you can see the light pass through the object and the shadow is casted not in the entire object, I don’t know what to do, I tried changing a lot of settings, but the raytraced distance field shadow, makes my shadow looks good as you can see, but don’t reach all the object, if I disable my shadow looks horrible and even though do not reach until the end of the object. I already saw the documentation and the lighting trobleshooting, but did not find my answear to this.