My New Samsung le40c530 Tv Wont Tune Into The Freeview Channels?

Iv Just Bought The Tv An It Says It Has Freeview Built In But After Rescanning The Tv Neumrous Times there Is Still Just The Basic 5 Channels. The Ariel Wire Is In the Back Of The Telly that Goes Up To The Ariel On Our Roof and everything Is Set Up As It Shud Be! Is there Something I am Missing? HELP!