How To enable Xdebug on Acquia Dev Desktop?

Hi
Does any one know how to enable
Xdebug on Acquia Dev Desktop please?

I have tried this but it still doesn't work

http://xdebug.org/wizard.php

Summary

Xdebug installed: no
Server API: Apache 2.0 Handler
Windows: yes - Compiler: MS VC9 - Architecture: x86
Zend Server: no
PHP Version: 5.3.18
Zend API nr: 220090626
PHP API nr: 20090626
Debug Build: no
Thread Safe Build: yes
Configuration File Path: C:\windows
Configuration File: C:\Program Files (x86)\acquia-drupal\php5_3\php.ini
Extensions directory: C:\Program Files (x86)\acquia-drupal\php5_3\ext

Instructions

Download php_xdebug-2.2.3-5.3-vc9.dll
Move the downloaded file to C:\Program Files (x86)\acquia-drupal\php5_3\ext
Edit C:\Program Files (x86)\acquia-drupal\php5_3\php.ini and add the line
zend_extension = C:\Program Files (x86)\acquia-drupal\php5_3\ext\php_xdebug-2.2.3-5.3-vc9.dll
Restart the webserver

When I restart it say's unexpected "("

Many thanks for your help