Anne, As Gary said, if the images were burned to the CD, the images should still be there (unless you have a rewritable CD). What may be happening is that your machine is just not properly reading the CD.
If you have access to another machine, perhaps you can see if that (other) machine will recognize the CD.
Sometimes it takes a gentle "slam" of the CD drawer to put things to right.
And of course, a most hearty
to TS!
Harv