You won't get LTV unless you live in lesotho and it is not an HD channel.
Firstly you need an HDPVR to watch the HD Channels. Then go to www.dstv.com click "my account". Login (create an account if you don't have one linking it to your smart card). Click manage packages. Click "Connect & Disconnect Services". Expand your hdpvr smarcard and make sure "High Definition Bouquet " is active.