How do I connect my ipod to my TV so I can play music?

So I have just recently got a new ipod touch - fourth generation for christmas. I'm trying to connect it to my tv which is about 5 - 6 months. I'm using the cord/cable thing you use to connect it to your computer and it is connecting just won't play the music that I have got on my ipod. (440+ songs)

So far , all it has done is do a slideshow of all my pictures that are on my ipod.

Why isn't it playing the music?