The pintoanimation attribute only turns on the effect of target geometry on the object. The object must have the targetP attribute, otherwise it just takes P:

When 1, the point is hard constrained to the target animation (e.g., targetP). When zero, the point is unconstrained.
http://www.sidefx.com/docs/houdini/nodes/dop/finiteelementsolver.html#target-attributes