Hi,

i have a gallery, look this http://enjoy-vietnam.com/zenphoto/quang-tri/tran-doi-thit-bam-hamburger-hill-/

all images are in 3648x2736
now i has upload an image with 10679x2955

why zenphoto dont show this picture and also the thumb?
how i can set this?

The image is too big for your sever to process. Upload smaller Images or get a bigger server. See the troubleshooting on that.