Timeline doesnt match audio/music display

> The timeline seems to match up with audio/music graphical display ONLY the
> first time the movie is started. If I stop the movie and move the marker
> on
> the timeline, it gets off sych with the audio itself.
>
> I am trying to do the simplest thing - add music to clips of jpgs, and it
> appears to be impossible to work up and down the timeline and be able to
> move
> the start of a clip in order to match the music - i.e. make a clip start
> at a
> particular spot in the music - since the timeline refuses to match the
> audio
> track.
>
> What in the world is going on?
>
> thank you for your help.
> --
> Gato Viejo