Can I run Memcached for multi vB forums on a same server hosting?

[Mattwhf]

I installed memcached on my hosting but it's running good for a forum.

When I activated memcached to enable for vB forums on a server then it worked incorrectly, then forums are using a same database from one forum hence I only can use memcached for 1 forum.

Here's codes that I enabled them in config.php for forums

$config['Datastore']['class'] = 'vB_Datastore_Memcached';
$i = 0;
// First Server
$i++;
$config['Misc']['memcacheserver'][$i]                = '127.0.0.1';
$config['Misc']['memcacheport'][$i]                        = 11211;
$config['Misc']['memcachepersistent'][$i]        = true;
$config['Misc']['memcacheweight'][$i]                = 1;
$config['Misc']['memcachetimeout'][$i]                = 1;
$config['Misc']['memcacheretry_interval'][$i] = 15;

How to fix this? should I change port or memcacheserver or something else?

Please advise.

Thanks