Sandisk ULTRA 8GB Not reading..

Sandisk ULTRA 8GB 50MB/s not reading through my CF card reader. It works perfectly fine in my camera. But I can’t download my images to my computer. It’s worked in the past is which is why I’m super confused.

The CF card reader reads my older Sandisk Extreme III 8GB 30MB/s card. So I don’t think its the reader.

Help????

Strange...one thing you might try, especially since the issue seems isolated to a single card, is to blow out the holes with compressed air. Something like the cans used for cleaning keyboards. Heck, even a good hard blast from the mouth might clear the issue. Its a long shot but these cards do collect dust.