Expire problem

[Ivan]

Hello,

i have memcached 1.4.5 on Centos 5.5, my sets seem to expire (no
matter what i put as expire time, infinite or 5mins 1 hour etc) after
few seconds and my cache is not full
its not code problem since i've retested it with most basic example
like this ->
"<?php
$memcache_obj = new Memcache;
$memcache_obj->connect('127.0.0.1', 11211);
if ($memcache_obj->get('time') == "") {
        $date = date("H:i:s");
        $memcache_obj->set('time', $date, MEMCACHE_COMPRESSED, ');
}
echo "At ".date("H:i:s").", your key is ".$memcache_obj->get('time');
?> "
Also restarting memcached didn't help.