Help Please.

Just bought a Dolby digital 5.1 surround soud home theatre system. I've got it set up and working fine while playing DVDs. But when I try to put on to my TV (freeview atm) it won't work. I've tried EVERYTHING except HDMI, Coax and Digital Optical. That includes Analogue video connection, Component video connection, SCART connection, Using AUX IN/OUT cables.

Any help will be appreciated.