Iso will make coster

I just started using clonedvd2 the download trial,

I have been able to back up 3 movies so far but I have a problem, when i rip to iso then try to burn the iso useing clonedvd it makes a coster. however if i use winrar to extract the files i can burn the dvd with clonedvd and it works.

is this a bug in clonedvd or my dvd burner

The default for CloneDVD is file mode. CloneDVD will burn the data in the VIDEO_TS folder directly to the DVD.