itunes does not recognize photos

Hi all, Im using Itunes 12.1 with iphone 6 plus 8.3 firmware version, when i tried to sync photos from my desktop PC, I selected a folder full of jpeg images and when I point to that folder, it doesn’t recognize any of the pictures, it acts as though the folder was empty. Anyone has the same issue and any help on this?

Much appreciate your help.

Sean