php multi server set doesn't work

[saad]

hello,

I try to set two memcache server a key. When I get this key from the
first server it work but when I try to get this same key on the second
one, it return false. Any idea ?

My code is :
<?php
$memcache = new Memcached();
$memcache->addServer('myserver1', 11211);
$memcache->addServer('myserver2', 11211);
$memcache->set('var', 'myvalue');

$memcache = new Memcached();
$memcache->addServer('server1', 11211);
echo 'from server1 : var = '.$memcache->get('var'); //return 'myvalue'

$memcache = new Memcached();
$memcache->addServer('server2', 11211);
echo 'from web2 : var = '.$memcache->get('var'); //return false
?>

thanks for your help

Saad