Invalid or Unsupported image file format

I am using an ImgBurn software application to copy my files and folders to CD/DVD. I have a PC game as well as a movie which I am trying to copy with ImgBurn software and it does not let me do that. The file is just a 730 MB and 230 MB files. But the time I try to copy it throws up an error message that the file is not supported.
“ImgBurn
Invalid or unsupported image file format!”
OS: Windows 7 Ultimate
I am not sure how to burn this to a DVD. Is this some kind of bug in the software? Or can I use some other software similar to this in order to burn the image?
