burning a cd


I have a cd that I am trying to burn and it doesnt seem to work.I have an imac with only one cd/dvd burner.I put the disk in and goto file and click burn disk then it tells me to remove the disk and put a blank disk in but when I do the original is now removed and there is nothing to burn.I made a duplicate then burned that but it doesnt work on my cd player only the computer.I went to disk utility and created a disk image but it came up blank.I never made a disk image before maybe I did it wrong.any help would be appriciated.