Class files and accessing functions in them

Hi all this is my first post here, relly exited if i can get the help I need :slight_smile:

Short description of my project:
I’m making a “flash-car-damage-registration-program” where a user can click on a part of a car, make two choices (from two comboboxes) that describes the damage, and then save it in a datagrid withing flash.

I have split up the code in different class files:
I have a damage.as class file that describes the damage and its properties.
I have a carPart.as class file that extends the Movieclip class. This sets all the properties of each carpart and where the roll-over/out eventlisteners are, pluss som descriptive text to each carpart. This works the way I want it to. This is just to quickly give you an idea of what I’m working on.
So to the real question or problem: I have a LoadMyXmlData.as class file where I load some xml data, this works fine. A function in this class takes a combobox and a xmllist as parameters. I want to populate the mentioned comboboxes from the xml data. Both comboboxes are on the stage within another movieclip, but I can seem to access them. (yes, they have instancenames etc) I get error 1120: ‘Access of undefined property’. I have tried ways like: ‘containingMc.comboboxMc’ and so forth but no luck. I have been searching the web for days for a solution to my problem, but nothing so far.

Am I doing this totally the wrong way? Isn’t this possible at all without ‘hacks’ or what I call workarounds?