Why can access the dynamic textField inside a Button?

Question

yep, I have another problem
I create a button in the library, it has a background graphic
on a layer and a textField, the textField has a instance name
defined in the properties panels and some text. I manually place
some instance of the button on stage, I give them different
instance names and voilà a new problem arise
when with actionscript I try to assign a new text to the
textField inside a button it throws me error 1119. A quick look at
the menu option debug ->list objects, shows me that the instance
name of the textField inside the button it is not what I defined
but it was replaced with some random name like "instance66"
I did a test with a movieclip instead of a button and I can
correctly access my textField with the instance name that I
manually defined.
Why that can be the same with the button? And if for some
arcane reason cant be possible to access a manually defined
instance inside a button WHY flash give me the possibility to give
an instance name to a dynamic textField inside a button?

Answer 1

Buttons simply do not have the same properties and methods
that movieclips have. Anytime you want to create a button that has
anything beyond the simple 3 states of activity, use a movieclip.
I can't answer why flash allows you to give an instance name
to the textfield, but in any case, it won't allow you to use
it.