Strange for XP. What exactly happens when the video should be playing? Can you get ML to play any video on this machine? Also, are you using any parameters, and how are you implementing the video--e.g., what item type, as a backvideo?, as a que item vs an exp item? Also, v2004 is going back a bit in terms of current support knowledge--by chance if you play the same video a second time with the same questionnaire--does it appear and play ok?