When you say you're capturing DV, can you confirm that you're capturing over FireWire from a miniDV camcorder and that you're using Premiere Elements to do the capture?
Also, does your camcorder have a dubbing feature for adding narration to already recorded video?
There are other possibilities (such as the possibility that you have your camcorder audio set to something other than 12-bit 48K sampling), but we need to know what we're dealing with first.
In Timeline View Mode, also open up your Audio Mixer (Window>Audio Mixer) and play your Timeline. Watch the meters in the Audio Mixer. Do they all show the proper levels? Do you hear both your AV's Audio and your Music?
While there, look at the bottom of your Audio Mixer, under each Audio Track. Is Mute checked here?
OK, thanks for the suggestions, but I fixed it myself.
All I had to do was take the clips that had the audio I wanted and move them onto another track.
So for some reason, simply taking the tracks (what used to be Audio 1 and Video 1) and delinking them and then dragging them up or down into Audio 2 and Video 2 (or 3) fixed the problem.
Good news and thanks for reporting.