The answer lies elsewhere in this forum. Simply put, when you deleted images from your card in the reader (or even rotated the images), you made the card unuseable in your camera. The FAT or FAT32 format that is expected by the card reader is different than the FAT12 format that is required by your camera.
Here's a link to one solution, which I use: http://www.stevesforums.com/phpBB2/v...634&highlight=
Check back in the earlier posts regarding SmartMedia card errors. If you can't find them, let us know and we'll point you in the right direction.