Folder tree(requires PHP) not works?

[pinguino]

I downloaded "Folder tree(requires PHP)" zip file but it doesn't work. I see in the page of the browser code:

$tree->addToArray(1,"America",0,"");
$tree->addToArray(2,"USA",1,"");
$tree->addToArray(3,"Alabama",2,"http://www.dhtmlgoodies.com","frmMain","images/dhtmlgoodies_sheet.gif");
$tree->addToArray(4,"Alaska",2,"http://www.dhtmlgoodies.com","frmMain","images/dhtmlgoodies_sheet.gif");
$tree->addToArray(5,"Arizona",2,"http://www.dhtmlgoodies.com","frmMain","images/dhtmlgoodies_sheet.gif");
ecc....


why?

[Batalf]