audio problem...

So i am making this movie with music in the background and i have about 2
mins of it finshed. However, i put in a new block of video and now when i
play the whole thing, when it gets to the new frame, it won't play any audio
along with it. (the song is still a minute longer on the time line, but the
song won't continue with the video..) But if i start the video in the middle
of this new frame it plays, with the audio... what is going on with this? how
can i make this entire video play with the audio to back it up?

I think you'll find that if you add audio or caption on a frame it is
synch'd to the video Unless you change the video then the audio stays in the
same place while everything else is shuffled along. Try adding the audio or
whatever last.