I am running MediaLab 2004 on my laptop and the computers in my advisors lab here at Purdue. I created a video that I would like to show participants (a .wmv file). The video plays in my questionnaire on my computer, but when I copied the files over to the lab computers the video does not work properly. I have sound but no picture. The video plays in Windows Media player on the same computer (which is what I thought played it in MediaLab). Am I doing something wrong? Do the files have to be in a different format (mpeg, mov)?