How can I get free view working?

I have a Tevion LCD tv which has inbuilt free view. For some reason no matter what I do Ican not get the free view to work even when following he instructions. As it would not work I tried plugging in a free view box and still could not pick up a signal with that. I have an ariel and signal booster all plugged in but still nothing. I have tried again with the in built freeview and there is a section where for first time intallation where it askes you for a code which Ido not have. Does anyone know how to fix this?