I'm pretty stuck here

I have a CH3SNAS on which my media (mostly photos) is stored and want to share this media with my recently bought Samsung LE40C650 TV (DLNA).
Problem is that the Twonky Mediaserver indexes the media fine, but I keep getting "unsupported filetype" errors on all my photo's and the tv doesn't show thumbnails either.
I've tried version 4.4 for DNS323 and 6.0.23 for DNS323 demo's and both have the exact same problem.
I uninstalled the demo versions and switched to MediaTomb instead, but I would rather like to use Twonky Media Server instead because it's a lot easier in it's use and doesn't require scripting knowledge etc.