Bitpm and enV2 problem

All of a sudden when I try to get images from my card on my enV2, the images are transferred, but they are 0kb. Has anyone else had this problem, and if so, is there a solution to this? Photos saved to the phone are fine, it's just the ones saved to the card that are emtpy files.

do they appear on the phone? Have you tried removing other photos and then only uploading those photos?