If you are already connected to a network, and then install SSL, you have to either maintain your current connection (which is not secure) or disconnect and then reconnect using a SSL port.
Not all networks have ports set up for SSL, yet others only allow SSL connections.
You can't have a secure connection to one channel, and an insecure connection to another channel using the same network connection, due to the fact that the connection isn't literally to the channel, but the server.