can someone help me plz cos im new one in this.

I had Opticum 7700 cicx and i converted him into Ferguson 8800 HD

Now i update software on FERGUSON to HF8800HD_1.15.0A.sgn

before when i go to menu ----advanced and i type 1234 i was able to put key for digitv and i cant.....

Can someone explain me what i have to do to insert new key in my ferguson

Do i have to do that with rs232 cable and what program to use or what...