Photos won't sync to my iPhone on PC

[noodenmichel]

Hello,everyone!
I am trying to sync my photos to my iphone. In itunes, I am able to check the box to sync, then check to sync a particular folder. After that I have tried clicking on Apply AND File>Sync iphone and then the photo box will gray out and the photos will not sync. I have tried different USB ports.
Appreciate your early reply!