在wamp windows 8中找不到Memcached

i am trying to install Memcached on windows 8 and Wamp.

i followed the guidance from here:

i.e:

Copy MSVCP71.DLL, msvcr71.dll to C:\windows\sysWOW64
Copy memcached.exe into C:\memcached
Click Windows-Key
Type: CMD
press: Ctrl-Shift-Enter
Choose yes
type: C:\memcached\memcached.exe -d install
type: C:\memcached\memcached.exe -d start
Copy php_memcache.dll to C:\wamp\bin\php\php5.3.4\ext
    Restart Apache using Wamp controls
    Enable WAMP -> PHP -> PHP Extensios -> php_memcache

however, when i try to call the class from within my Zend 2 module i get the following error message:

Fatal error: Class 'Memcached' not found in

i tried calling it like this:

$memcache = new \Memcached(); 
$memcache->addServer('localhost', 11211) or die ("Could not connect");

i also tried calling it like this:

define('MEMCACHED_HOST', '127.0.0.1');
define('MEMCACHED_PORT', '11211');

// Connection creation
$memcache = new \Memcache;
$cacheAvailable = $memcache->connect(MEMCACHED_HOST, MEMCACHED_PORT);

in my php ini file i did as follows:

extension=c:\wamp\bin\php\php5.5.12\ext\php_memcache.dll

i also went to my

Enable WAMP -> PHP -> PHP Extensios -> php_memcache

and enabled Memcache

however, i did notice that i could not find any reference to memcache in my php info

UPDATE

FOLLOWING the advice from this article

i ran the following test from my command line to see if the Memcached server is working:

wmic process get description, executablepath | findstr memcached.exe

it returned the correct path to teh file (which means its running correctly)

so, the problem is with the PHP file.

i have tried putting this as the full path:

extension=c:\wamp\bin\php\php5.5.12\ext\php_memcache.dll

or simply as this:

extension=php_memcache.dll

but to no avail