I have created some custom wallpaper and uploaded it to my SD card, but it is not showing up at all when I look for it in the Gallery application. I tried putting the wallpaper in my DCIM photos area, and I also created a Wallpaper folder and put them in there. Still can't get the images to show up at all. They are the correct size and are saved as jpeg files in Photoshop. What should I do?