Provide a javascript for u3d annotation inserted in a pdf file.

I am searching for a javascript piece of code that would allow launching the animation of a u3d file that is embedded inside a pdf file.
I was able to build such a javascript in the past but the scripts have stopped working with newer versions of Adobe Reader. The u3d content does appear but the javascript code fails to launch the animation despite not throwing any exception.
Also, I am wondering if there is any way to extract javascript from existing pdf files.

Enclosed is a pdf 3d file that would work as expected with adobe reader 32 bit but fails to execute correctly with any 64 bit file.