W3 / Memcache & Multi Site Domains

Hey there! Have a wp multisite on a private VPS hosted and finally got memcache / memcached installed and working on our main site, so I can select it to perform various tasks in w3 cache

the problem is, when i go to general w3 settings for other sites in the network I see the below:
The following memcached servers are not responding or not running:
Database Cache: 127.0.0.1:11211.
Object Cache: 127.0.0.1:11211.
Page Cache: 127.0.0.1:11211.
Minify: 127.0.0.1:11211.
This message will automatically disappear once the issue is resolved.