Don't know if this has anything to do with it but are your pics jpeg? I purchased a DVD player on Friday. It specifies that it plays jpeg. I put my photo backup CD in just to see what happened because the photos are in different folders not individual pics or a slideshow.
It opened the folders and played them all in colour as a slideshow. I can also open the individual folders and play those separately.
I used EasyCD to make the backup disc doing nothing special other than saving them to CD rather than a floppy.
My Player instructions book states all files must be extended by 'JPG', 'jpg', 'JPEG', or 'jpeg'
and compressed in format 4:2:2 or 4:2:0.
Don't ask me what compressed format is ! I must just have been lucky.
Hope this is of some use.