Splaaty

Hi there! I have a problem when trying to burn .img-files. This problem hasn't shown up earlier, I have burn DVD movies without problems before. When the burner comes to ~ 60 %, this error message are shown. I have tried with a lot of things, new burner (the other was old), new media discs, and I have changed computer. Does anybody knows whats wrong? Help would be greatful. Regards. Splaaty