Multiple object map scrolling

Im kind of new to the whole game programming in actionscript and my code is very basic, nub style.
The example of the mario style game I have currently is located here: http://www.rheniummusic.com/chris/rheniumrpg2.html
As you can see i like to display exactly whats happening with my variables at all times.
Anyways, you can see my problem right away, the map will scroll, but only that one, the original block, scrolls with the map, the other instance of ‘block’ does not.

This is the code relative to the map scrolling:

function movemapleft(){
_root.perffunc = true;
_root.block._x -= _root.movespeed;
_root.ground._x -= _root.movespeed;

}
function movemapright(){
_root.perffunc = true;
_root.block._x += _root.movespeed;
_root.ground._x += _root.movespeed;
}

(BTW all of my code is located in the “God” movieclip, thats why that is there)
Now, i realize that by saying " _root.block._x -= _root.movespeed;", the _root makes it only the one object.
How can i make it so that it will scroll every instance of the object called block, no matter how many times i copy and paste it?

and if you need the rest of the code just let me know, ill post it.