Try saving the audio as a WAV file and importing it seperately to the video clip.

To do that, you just pick out the section of the video you're after and then go to file -> save as WAV (I think that's what it's called). Then when you save the video, save it without audio (select the 'no audio' option). Import both files into your program, align them on your timeline and you should be okay.

Hope this helps!