Hmm regarding "Would it matter that I used a software to burn it that I no longer have?"
The answer to this is NO, i does not matter if you do not have the software anymore. The software is just used to put the files on the disk, once the file is on the disk the software isn't in the equation!
Look under the disk at the data side (not the writing side) can you see a shaded ring where the files were burned? If you can't see it, sorry to say you probably didn't burn it correctly mate
