Proxy and DisplayObject

Hi,

There (http://www.coronalabs.com/blog/2012/05/01/tutorial-property-callbacks/) is a great tutorial how to wrap the DisplayObject in the “proxy”  - it is necessary cince due its native background the DisplayObject cannot be “inherited”. It all works just fine, but whatever I tried I am still getting an error

bad argument #-2 to 'insert'

When I try to insert the created object into DisplayGroup :

self.view:insert(fish)

Can anyone help there? After several hour of experiments I am off:((

Thanks a lot!!

STeN