Rebel XT Photos show up blank on computer but show up when CF card is in camera

[WBarker01]

Hi there! Pulled out my older Rebel XT and took photos on vacation. I got home and downloaded off the cf cards but they show up blank on the computer and in the digital photo professional system. When I put the cards back inside the camera I can still view the images. Any ideas what I'm doing wrong?

[FloridaDrafter]

What version of DPP are you using? I think I read that newer versions weren't compatible with some older cameras. A quick search confirmed this, but there was conflicting info and I have no patience, LOL!

Newton