read the sticky threads at the top of the page,
post again if you get stuck, give as much info as poss
about the setup and problem your having,
as dangerous said. if you need to use a null modem
to usb converter lead, they can be a bit tricky but can be sorted out.
If your null moden cable plugs straight into the back of your computer it's a doddle.
you will need 03/12/2011 firmware if it has not been flashed before
(see jodavs link in the other thread)
good luck !!!
Just read your other thread !
Did you used to have the pay channels before the boxes went off ?