How to watch privat Channels?

My Satellite Setup
Pixx ADT 1210 DD
Hi all, I'm new on this busines. I bought a new receiver called:

Pixx ADT 1210 DD

and I want to watch the TV Cabo Channels on the Hispasat.

I found some pages with Key's and Systemupdate. After updating the System with the programm / rom and key. I tought it should work.

Program: Pixx Link 2.1
Rom: 2005_03_22_1210DD.ROM

I don't know what i have to do, I can't see the privat channels :(.

Does someone know how it works? I heard, that i have to install the nagra on the receiver, but where does I get it and how should I install it?