Smarty Problem---Variable cannot be displayed in HTML

Smarty HTML

1.php
Include_once ("libs/smarty.class.php");
$smarty =new smarty ();

$smarty->template_dir= "Templates";
$smarty->compile_dir= "Compile";
$smarty->config_dir= "config";
$smarty->cache_dir= "Cache";

$smarty->left_delimiter= "{";
$smarty->right_delimiter= "}";
?>

2.php
Include ("smarty_include.php");
$name = "This was an apple!";
$smarty->assign ("abc", $NAME);
$smarty->display ("index.html");
?>

Index.html

{$ABC}

The $ABC in index cannot show the value of $name
2.php can be displayed in the apple!
May I ask why this is

Reply to discussion (solution)

Download the latest smarty:http://smarty.php.net/current version: 2.6.18 after extracting the Libs directory in the directory renamed to Smarty, copy to your site directory, At the same time, in the site root directory established templates and Templates_c two directories to establish test.php, the contents are as follows: 
 
   template_dir = "./templates";//Template Storage directory $smarty Compile_dir = "./templates_c"; Compile directory $smarty-left_delimiter = "{"; Left delimiter $smarty-right_delimiter = "}}"; Right delimiter $smarty-assign (' Test ', ' OK '); $smarty, display (' test.html ');?> to Templates_c permissions 755 Create a new test.html in the templates directory:     {{$test}}   

Test.php shows OK, but test.html is {{$test}}, no value displayed, no difference. I want to know how to display {{$test}} in the HTML file.

Confirm that the Smarty is properly configured ... I don't know what version of your smarty is.

Test.php shows OK, but test.html is {{$test}}, no value displayed, no difference. I want to know how to display {{$test}} in the HTML file.
have permission to set the cache directory

3.1.13 and 2.6.27 versions, have tried.

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