Problems adding new buttons

Hi!
I find this nice movie from:
“Lukas 238” Simple Desaccelerating Menu Bar
http://www.flashkit.com/movies/Interfaces/Menus/Simple_D-Lukas238-11024/index.php
with 6 buttons I’m trying to do a presentation work for my school and I can’t add a new button for some reason doesn’t allow me to change or load the image 7,8,9 or 10 it give me an error, all I need to do is add 4 more buttons with my 4 new images, when I click in the button 7,8,9,or 10 it show the same image in button 6, and I also change the number in the action script to 7,8,9,and 10:

onClipEvent(load){
_texto = “Area 7”;
}
on (release){
_parent._changeArea(this._name);
}

can some body help me out with this remember I’m new in flash but I can follow step by step with no problems
Thanks!

How can I send you an attac with the .fla file is only 497 KB?