Are you sure it's not firewalled off? The service can be on but no packets may actually be delivered. – Wes HardakerApr 7 '11 at 3:34
just pointing out, there is no such thing as tcp:// and it doesn't even look like there is such a thing as telnet:// but your command would work. if .. – barlopJul 8 '11 at 0:23