Many thanks for that, got :
Results

TCP: The TCP connection has been refused, the port is closed. Either a firewall or a router has not been configured on this port, or no application is currently using it. Make sure your firewall or router is properly configured to not block or forward this port and that Shareaza is running and configured to use this port. UDP: No answer has been received from your client. This can have various reasons, like that your firewall or router isn't properly configured for Shareaza, or Shareaza is not running on this port, or not connecting to the networks. At least one problem has been detected and you probably have to configure your firewall or router for Shareaza.

(I'm on Frostwire)