Camtasia .swfs won't start -- sometimes

Have you tried opening the .swf files straight from the server, not going through Lectora? That would give you an indication of where the problem lies. Thanks, that was the thing to do. I believe the problem is caused by movement in the first couple frames of the .swf -- it seems like the server is loading the first two frames, and if the .swf is moving at that point it sometimes loses the connection -- or something. The problem doesn't happen on my computer, presumably because it's loading too fast. I will reproduce the videos to see if that handles the problem. Thx.