Nikon D90 pictures not showing up in Adobe Bridge?

I have Bridge CS5 and whenever I plug the camera in directly using the USB, it fails to show me thumbnails of the pictures. This is the problem for All types of files (JPEG, RAW, etc). I thought it was my memory card, but I tried it with two other cards and the same problem persists.

I've also tried a card reader, and only TWO of the cards show the thumbnails (both SD). The other card is a 8GB SDHC card, which fails to show thumbnails when I plug it into the computer directly (via the camera) and the card reader.

Added (1). I have Windows 7 (32-bit).

I think it may due some resolution or pixel problem you may contact nixon for these issue

That's normal… Adobe Bridge won't generate thumbnails for image files stored on your camera/memory card, I'm guessing that this is because to generate thumbnails Bridge would need to modify/append the image data on the card- which could potentially be a bad thing. No DSLR I have ever used will display image thumbnails in Bridge of files still stored on the camera's memory card. If you want to preview the images in Bridge you will need to import them to a directory/folder on your hard drive first and then open that in Bridge. Otherwise you would need to use Nikon's image viewer if you wish to preview the images whilst they are still on the camera's memory card.