QUOTE(MissMunchy @ October 8 2007, 03:42 PM)

I COULD see them on my camera before I took them out...now I can no longer see them on my camera. I have tried viewing them on several computers and two cameras. should I still pursue a recovery program?
Yes. There's a very good chance that you'll be able to recover them.
Do you format your cards before each use? You should. Do the formatting in the camera and don't ever delete images. Keep them on the card until the next time you use it, and then format it.
This is the most common explanation to "lost" images on cards. If you're doing all that, then it's probably just a hiccup.
There are several recovery programs out there. I got one free with my Lexar cards. Works well for all kinds of files (not just images) and all kinds (and brands) of cards.