I need help on how to programmatically add a neon-animation?

[claudio....@gmail.com]

Hi,

I have tried to do this, but without success:

<neon-animated-pages id="pages" class="flex" selected="[[selected]]" entry-animation="[[entryAnimation]]" exit-animation="[[exitAnimation]]">

</neon-animated-pages>

Polymer 

(...)

    addAnimation: function(){

         neonanimatable = document.createElement('neon-animatable');

         this.$.pages.appendChild( neonanimatable );

    }

(...)

inspecting the element "pages": this.items not contain the added element (neon-animatable).

It seems that the item is not registered properly...

What am I doing wrong?

Thanks in advance,

Claudio