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Tracks sync (or something else) problem

Hi everyone, 
when I try to play a quicktime movie with two midi tracks I don't hear the first note of one of the tracks.
To add a track from existing movie I use this code:

Movie theMovie3 = midi1;
Track track1 = GetMovieTrack (midi2, 1);
Media media = GetTrackMedia(track1);

OSType myType;


Track track3 = NewMovieTrack(theMovie3, 0, 0,
GetTrackVolume(track1));
GetMediaHandlerDescription(media, &myType, 0, 0);
Media myDstMedia;
myDstMedia = NewTrackMedia(track3, myType,
GetMediaTimeScale(media), 0, 0);


OSErr err = InsertTrackSegment(track1, track3, 0,
  GetTrackDuration(track1), 0);
err = CopyTrackSettings(track1, track3);
return theMovie3;

Thanks!
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