Blender Video Editor

Hi, So I wanted to use the Blender video editor I added a sound and I played it back and there was no sound coming from blender? It worked fine in 2.49 but in 2.5 it does not work. Maybe i’m missing something?

So I looked around 2.49 again and I found out that the song only plays when you press Alt A in 2.49 and it wont play when I just press play on the timeline. In 2.5 It does not play either way?

Same here. No sound, image, video in Blender 2.53. Any version.
Works fine in 2.49.