CD-RW and DVD+R unreadable in PhilipsDVP3020 player



Dear People,
who can help. I have a HP Pavillion with a HP DVDwriter 640c, running on XPProSP2; I burn with Roxio; after burning I close a cd/dvd entirely; and use as ISO; all cd’s and dvd’s are readable on all my other computers and at stores where I bring them to print pictures.
When I use this system to burn JPEG pictures on a CD my Philips DVP3020 DVDplayer sees the images, but is unable to display them. The same occurs on the LG dvdplayer of my daughter.
Has anyone any idea how to tackle this problem ?



Standalones normally need images with a specific max resolution and size.