Action with Curve 'Start and End Bevel Factor'

Blender 2.64:

I want to create an Action to animate a bezier curve (which has a bevel object). I am able to create an Action which animates the Start Bevel Factor and End Bevel Factor and it works for the curve for which I create the Action.
However, when I apply the action to another bezier curve (which has also a bevel object), nothing happens.

Am I missing something? Any hints are highly appreciated
blackno666

CurveAction.blend (463 KB)