create symbol and animate (example from API doc working?)

Might be missing something simple, but this doesn't seem to work and it is right out of the API doc

brand new edge animate file.

make a rectangle - convert to symbol with name "kitten_paw"

delete from stage

paste this code in time line (say at 1000)

sym.createChildSymbol("kitten_paw", "Stage");

var kitten_sym = kitten_paw.getSymbolElement();

kitten_sym.animate({opacity: 0}, 500);

it creates the object but doesn't animate it - and console returns an error - edge.2.0.1.min.js:162Javascript error in event handler! Event Type = timeline

Am I missing something?

thanks!