Please help

Hello Every one This is the first time i have posted a massege in here and what i would like to know is i had some russian channels on sirius and reacently i wanted to which to astra to watch eurosport cuz my friend was boxing on there and when i tryed i couldnt find the exact please where to get the signal.
so now i wanted to go back to the russian channels and i couldnt even find that so i tryed hotbird still no look.

can someone please tell me what i need to do or what i need to get to find the signals easyly.

i have a 100 cm disk and a samsung digital reaciver satellite reaciver DSR9400 FTA.

Thank You In advance