Can only hear A1, A2 on audio timeline, What to do?

[RomanJaquez]

I am in the middle of editing a TV show and now, I can only hear the audio tracks: A1 and A2 in the timeline. When I bring another clip from the Browser window into a video track V3 and audio tracks A3 and A4, I cannot hear the audio unless I move it up to A1 and A2. I have attempted to figure out the problem but no success yet.

PLEASE SOMEBODY HELP ME. I am in big trouble if I don't me this weekend deadline and still have lots of work to do.

 

[NoahK]

Are the tracks enabled- green button on the right side of the timeline.