digivox XL, lose of channels?

hello! i have a digivox xl, i have lost all channels exept 1 to 5, when i press the EPG button (the one that gives u the t.v guide) and i have all possible channels listed with a brief description of whats on. but all i can whatch is 1 to 5, i have re booted and made sure EMU is on, i have tried this loads but still only get 1 to 5! can anyone help please? :)