This depends on which decryption card system or emulator you are using. On mine I put the AES key in positions 00 and 01. But in other systems you have to put them in other positions. I suggest you give more details of what you are using for decrypting..
I'm using an Echostar 770 Fta with a flash of SRT 6155.I'm editing and sending the Keys files with Weaksoft 1.6.0 but I don't know where to make the Multivision Keys! 00 and 01?
By the way, do you know if there is a Nagra 2 Patch for this receiver?