Sensi,

Sounds like the plugin cannot connect to Squeezebox Server (yes, it has been renamed again!)

Make sure that your plugin settings use correct CLI (command-line interface) port that is configured in Squeezebox Server. Also check if security settings are not too restrictive in Squeezebox Server.

If this does not help, try to disable Windows Firewall for a minute on the server PC - it may also be a reason.

Andrei