Imported Pictures Using Picasa 3 - The Pictures Became Grey Boxes?

I imported my photos from my SDCard to my PC using Picasa 3, and everything was going smoothly... until I tried to take a look at the photos! all of the photos that I've imported using this method for some reason all became greyed out! Viewing them on Picasa3, all you can see is a grey rectangle, in place of the photos. However, when using the windows explorer folder, i can see that the photos were imported correctly (it's not just a grey box, but the actual photos), but when I try to open it (using any program: Paint, Picasa3, etc), it is still a grey rectangle instead of the photos. I tried to upload the image and send it via email, and I get the same result.In my mistake, I chose to "delete the uploaded photos after uploading" option..it's my vacation photos from Croatia I'm not sure if there were any errors when I imported it... i stepped out for a bit while I was waiting for it to import. I looked around my SD card, and looked at the "Lost.dir" folder, and copied all of what's in there.I did use Glarysoft to recover the images, and I'm using a Windows 7 laptop as my computer. Also, are there other alternatives? I did save the lost.dir with all of the photo files in it, both in my SD Card, and on my laptop.