Accessing children of children

Hey!
for some reason STORAGE[0].getChildAt(0) works whereas liner.getChildAt(0).getChildAt(0) does not. STORAGE is a movieclip and a child of liner. the error is something about not being able to use getChildAt on a display object.
what's wrong? is there any other approach i could use?
PS: liner.getChildAt(0) works and does indeed seem to refer to STORAGE[0]
thanks!!

What do you mean when you say "liner.getChildAt(0) works and does indeed seem to refer to STORAGE[0]"... in what ways does it work and seem? You might find out that what you believe is STORAGE[0] is not.
Try using...
trace(DisplayObjectContainer(liner.getChildAt(0)).getChildAt(0));
and see what comes up.
If you have direct access to the objects via the STORAGE array there is no need to be trying to reach them via whatever you might have added them as children. The reference in the array is a direct line to them.
You should show the code that creates this system so that it is clearer what each element is and from where each arises. If you are getting an error message, include the complete message.

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