Ultra CF 8GB Saw pics on camera preview, won't show up on computer...

I have been using my Ultra CF 8GB card for over a year now with no problems. I just got done taking some pictures and I reviewed them on the camera. Then I plug the card into my card reader as always to upload to my computer and the pictures from my previous session come up. Even though I deleted them before my current session. So, I try to put the card back in my camera and now it says it can’t play the pictures back.

Any ideas?! I really need the new pictures as I already have the previous session on my computer. I tried uploading them anyway thinking they may be the new pictures but they upload and then just show the CR2 icon and will not open in bridge or photoshop.