"Problem downloading image" from iPhone

When I connect my iPhone and open iphoto, it lists as "iPad" and when I try to import photos, it says that it cannot because there is a "Problem downloading image." I get an "Import error" when I try importing via Image Capture. I actually removed all the photos from my iPhone, but the same problem occurs. Note: When connected and the preview comes up of the pictures that can be imported, they're all blank (i.e., black "photos" - can't see any preview).

Also restored iPhone, but the same problem occurs.

Can anyone help?