Please play the movie with PowerDVD player or WinDVD player for several minutes and then try DVD-Cloner again.
If it can't, please try other movies instead.
If the same problem still exists, please tell us about the error message in detail, and we will then be able to help you more. Please try to unclick the option: "Enable Smart Analyzer before reading the disc" and then try again. You can find the option in the "Copy" tab of the "Setup" window.