Ok to lock out a channel set your 4 digit pin in the parental lock menu, dont use four zeros as your 4 digit pin.Useing four zeros will deactivate any locks. So enter your 4 digit pin,other than four zeros, it will ask to enter it a second time, press the green botton to save your pin number.Now put up your service list highlight the channel you want to lock, press the menu button, scroll down to lock, press lock ,now your channel is locked.You will need to enter your 4digit pin to view the locked channel.It might be a good idea to reboot the box when you have all channels locked out that you want. Rebooting the box gets the box to memorise the channels you have locked out, if you dont reboot the box ,the next time you unplug the box all the locked out channels will be unlocked again.When you plug it in again. Hope this sorts it out for you.