Plex won't recognize any .jpg photos

Hi,

I'm running Plex ( Version 1.10.0.4523 ) on a DS416play. I've added libraries for movies, videos, TV shows with no problem. However, when I try and add a folder for JPG photos it can't see them.

I've checked that Plex has R/W permissions for the folder but still no luck.

Any ideas?

Thanks,