What, exactly, is your problem with getting service started? Can you be more specific?
Assuming that you have all the correct equipment, it's hooked up correctly, and you can tune in the satellite (I'm not sure of the channel, but there is one channel that you can see prior to starting service...the Owner's Manual should have this information in their setup instructions).
Once you have that channel tuned it, starting service should be as simple as calling DirecTV and saying you want to start service.