I must be missing something simple but I am unable to play sound on a particular track unless I put the curser to just before where the sound was added and then it plays. If I try starting it in the middle of the song all I get is silence, the video seems to play with the original sound track but not with the sound I just added on another track.

BTW I have 2 sound tracks, the original with the video and a second one that has my added effects. It's the second one that does not seem to play unles I start at its beginning.

Steve