Receiver: StarSat 3100 ultra

Hello, I've got a simple problem whenever i want to input codes manually it never works. I want to try opening the ESPN Channel on Hotbird, and it is a Nagravision. If it is at all possible that someone could direct me on firstly how to get the key for this channel and how to properly input it into my receiver so that if may work. The more specific you are on how to do this the better it would be for me. Thanks for your help in advance. As for my receiver like i stated above it is a Starsat Sr-x 3100 cu ultra, and i believe ive got the latest firmware. Anyways thanks again.