Grobert

I have produced a few slideshows on DVDs quite successfully , but now when I bring the AV1 file to be burnt with ulead I keep getting the message " DVDMF has generated errors and will be closed by Windows. You will need to restart the program.An error log has been created " . I have tried over several days but the same message reappears - it seems near impossible to get in touch with ulead technical assistance. Any ideas? Grobert