Changing colour of button movie clip child

Hi,
I have a few buttons which I need to change the state colors using AS.
I am able to change the whole button color but not the state object (converted to a movie clip).

All the variables are dynamic and I have not been able to get to the child object.
var block_color = new Color("_root.c_Angola.c_1");
block_color.setRGB(“0x234234”);
OR
var block_color = new Color(“c_1”);
block_color.setRGB(“0x234234”);

How do I access the movie object which is in a button up state?

See files :


Regards,
Bug