multiple Path3DTweens in conjunction with TweenSequence and TweenParallel? 

I am attempting to add multiple Path3DTweens to a TweenParallel instance. 

                

                 
 ts = new TweenSequence();
                 
 ts.setName("ts");
                 
 ts.appendChild([instance of Path3DTween])
                

Exception in thread "Animation Thread" java.lang.ClassCastException: ijeoma.motion.tween.Path3DTween cannot be cast to ijeoma.motion.tween.TweenParallel

If this is not possible, how would you suggest combining multiple Path3DTweens in sequence an in parallel? 

Thanks