Problem with extension bbcode

[Marcin Kalak]

I'm trying to add a custom bbcodes for vBulletin. I created a file core/packages/vbenterprisetranslator/api/bbcode.php of content:

<?php
class vbenterprisetranslator_Api_Bbcode extends vB_Api_Extensions
{
  public $product = 'vbenterprisetranslator';
  public $version = '5.0.0';
  public $developer = 'vBET';
  public $title = 'vB Enterprise Translator';
  public $minver = '5.0.0';
  public $maxver = '6.0.0';
  public $infourl = '';
  public $checkurl = '';
  public $AutoInstall = 1;
  public $extensionOrder = 5;
  
  public function fetchTagList($tag_list, $prepend_path = '', $force_all = false)
  {
  	print_log("fetchTagList");
  	//body
	return $tag_list;
  }
}

function print_log($string) {
	global $request_last;
	$request_now =	microtime(true) * 1000;		
	$file = fopen(DIR . "/devlog.log", "a");
	//vbulletin->userinfo['username'] . " " . 
	$diff = (int)($request_now - $request_last);
	fwrite($file, $diff . ' '. date("d.m.Y H:i:s") . " " . $string  . " " . $_SERVER['REQUEST_URI'] . "\n");
	fclose($file);				
	$request_last = $request_now;
}
?>

However, my function fetchTagList does not start.