I have a Toshiba LCD TV 40E220U, and I am attempting to connect external speakers. The speakers have the red and white cords for audio input. I connected those cords to a digital to audio adapter, and I connected the adapter to the "Digital Audio Out" on the back of the TV (using an optical cable, the one where the red light shines through after being connected to the TV). However, sound is still not coming through the speakers. The speakers work when plugged in to other devices, so I know it's an issue with the TV and not the speakers. HELP!!!!!!! Please 
