What version of QT do you have? It is possible that yo jst need to redownload QT to get the newest version which is 6.3 or 6.0.3 or something. Try it then. If it still doesn't work, it may be the CD. I had an informational CD about the anatomy of humans a while back that used QT, but could never get it to work for some reason dispite the fact that I had the latest vesion of it.